Answer:
The measure of arc BC = 124°
Step-by-step explanation:
From the figure we can write,
measure of arc AB + measure of arc BC + measure of arc AC = 360
measure of arc AB = 146°
measure of arc BC = 90°
Therefore measure arc BC = 360 - (146 + 90)
= 360 - 236
= 124°
The measure of arc BC = 124°
Answer: 124 degrees
Step-by-step explanation: There is a 90 degree angle in the top right of the circle. There is a 146 degree angle. Add these two angles.
90 + 146 = 236
These two angles combined are 236 degrees. We are trying to find BC, which is the rest of the circle. There are 360 degrees in a circle. Subtract 360 from 236.
360 - 236 = 124
BC = 124 degrees.
A probability distribution showing the probability of x successes in n trials, where the probability of success does not change from trial to trial, is termed aa. uniform probability distributionb. binomial probability distributionc. hypergeometric probability distributiond. normal probability distribution
Answer: binomial probability
Step-by-step explanation:
A binomial probability indicates to the probability of having exactly x successes on n repeated trials in an particular binomial experiment which has only two possible outcomes.
If the probability of success on an single trial is b (which does not change) , then , the probability of failure will be (1-b) .
The binomial probability for success in x trials out of n trials is given by :-
[tex]^nC_x\ b\ (1-b)^{n-x}[/tex]
Final answer:
The distribution called for a fixed number of independent trials with a constant success probability is the binomial probability distribution, defined by the equation P(X = x).
Explanation:
The probability distribution that shows the probability of x successes in n trials, where the probability of success does not change from trial to trial, is termed a binomial probability distribution. The key characteristics of a binomial distribution include a fixed number of independent trials with two possible outcomes (success or failure) and a constant probability of success in each trial.
Mathematically, the binomial distribution is defined using the equation P(X = x) = (n choose x) * px * qn-x, where p is the probability of success, q = 1 - p is the probability of failure, and (n choose x) is the combination of n taken x at a time.
Expected Value (50 points)
Game: Roll two dice. Win a prize based on the sum of the dice.
Cost of playing the game: $1
Prizes:
Win $10 if your sum is odd.
Win $5 if you roll a sum of 4 or 8.
Win $50 if you roll a sum of 2 or 12.
1.Explain HOW to find the expected value of playing this game. What is the expected value of playing this game? Show your work. (30 points)
2.Interpret the meaning of the expected value in the context of this game. Why should someone play or not play this game. Answer in complete sentences. (20 points)
Answer:
the expected value is if your sum is odd because half of the values you could roll are odd witch means you have 50% chance to get odd
because their are not high odds of getting something good
Proportions in Triangles (10)
I am have trouble with these x-intercepts. Please help me.
Answer:
x=8, x=2 no solution no solutionStep-by-step explanation:
For the equation ...
y = a(x -h)² +k
you can find the x-intercepts by setting y=0 and solving for x.
0 = a(x -h)² +k
-k = a(x -h)² . . . . . . subtract k
-k/a = (x -h)² . . . . . divide by a
±√(-k/a) = x -h . . . . take the square root
h ± √(-k/a) = x . . . . add h . . . . this is the general solution
__
So, for each of your problems, fill in the corresponding numbers and do the arithmetic. If (-k/a) is a negative number, the square root gives imaginary values, so there is "no solution".
1. x = 5 ± √9 = {5 -3, 5 +3} = {2, 8} . . . . the x-intercepts are 2 and 8
2. x = -3 ± √(-2) . . . . . . no solution; the roots are complex
3. x = 5 ± √(-8/4) . . . . . no solution; the roots are complex
Answer:
Step-by-step explanation:
These are all done the exact same way. I'll do the first one in its entirety, and you can do the rest, following my example.
Finding x-intercepts means that you find the places in the polynomial where the graph of the function goes through the x-axis. Here, the y-coordinates will be 0. To find these x-intercepts, you have to set y equal to 0 and then factor. First, though, we need to know exactly what the polynomial looks like in standard form. The ones you have are all in vertex form. We find the standard form by first expanding the binomial, like this:
[tex]0=(x-5)(x-5)-9[/tex]
FOIL those out to get
[tex]x^2-10x+25-9=0[/tex]
Combine like terms to get
[tex]0=x^2-10x+16[/tex]
Now we have to factor that. I'll use regular old factoring, although the quadratic formula will work also.
In our quadratic, a = 1, b = -10 and c = 16
The product of a * c = 16. The factors of 16 are:
1, 16
2, 8
4, 4
Some combination of those factors will give us a -10, the b term. 2 and 8 will work, as long as they are both negative. -2 + -8 = -10. Fit them into the polynomial with the absolute value of the largest number named first:
[tex]x^2-8x-2x+16=0[/tex]
Now we group them by 2's without ever changing their order:
[tex](x^2-8)-(2x+16)=0[/tex]
and then factor out the common thing in each set of parenthesis. The common thing in the first set of parenthesis is an x; the common thing in the second set is a 2:
[tex]x(x-8)-2(x-8)=0[/tex]
Now the common thing is (x - 8), so we factor that out and group together in a separate set of parenthesis what's left over:
[tex](x-8)(x-2)=0[/tex]
By the Zero Product Property, either x - 8 = 0 or x - 2 = 0. Solving the first one for x:
x - 8 = 0 so x = 8
Solving the second one for x:
x - 2 = 0 so x = 2
The 2 solutions are x = 2 and x = 8, choices a and d.
In the coin value formula, V(t)= P(1+r)^t, which parts form the base of the exponential function? Which parts from the constant, or initial value? Which parts form the exponent?
Answer:
Step-by-step explanation:
The base of the exponential function is 1 + r.
The initial value is P.
The exponent is t.
The base of the exponential function is 1 + r
exponent is t, and
initial value is P
What is exponential function?The mathematical expression for an exponential function is f (x) = a ˣ, where “x” denotes a variable and “a” denotes a constant. This constant is referred to as the base of the function and should be greater than zero. The most common use exponential function is with base e
Given A coin formula V(t) = P(1+r)^t
to find the initial value put t = 0
V(0) = P(1+r)⁰
V(0) = P
P is the initial value
and exponent is the term which is in the power of any exponential function
here t is exponent and (1+r) is base function
Hence according to coin formula The base of the exponential function is 1 + r; exponent is t; and initial value is P.
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If you were to place $2500 in a savings account that pays 3% interest compound continually how much money will you have after 5 years. Assume you make no other deposits or withdrawals.
[tex]\bf ~~~~~~ \textit{Continuously Compounding Interest Earned Amount} \\\\ A=Pe^{rt}\qquad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill & \$2500\\ r=rate\to 3\%\to \frac{3}{100}\dotfill &0.03\\ t=years\dotfill &5 \end{cases} \\\\\\ A=2500e^{0.03\cdot 5}\implies A=2500e^{0.15}\implies A\approx 2904.59[/tex]
Answer:
C. $2904.59
Step-by-step explanation:
Compounded continually means that the principal amount is constantly earning interest and the interest keeps earning on the interest earned.
The formula to apply is
[tex]A=Pe^{rt}[/tex]
where A is the amount, P is the principal, r is rate of interest, t is time in years and e is the mathematical constant
Taking
e=2.7183, P=$2500, r=3% and t=5 years
[tex]A=Pe^{rt} \\\\\\A=2500*2.7183^{0.03*5} \\\\\\A=2500*1.1618\\\\\\A=2904.59\\\\A=2904.59[/tex]
Tina, the owner of a home and garden store, lends $8,000 to Lana to help her open an art shop. Lana plans to repay Tina at the end of eight years with interest compounded semiannually at 8%. Using the tables found in the textbook, you can determine that at the end of eight years, Tina will receive A. $14,484. B. $14,984. C. $16,587. D. $16,857.
Answer:
B. $14,984
Step-by-step explanation:
The multiplier is ...
(1 +r/n)^(nt) . . . . where r is the nominal annual rate, n is the number of times interest is compounded per year, and t is the number of years.
Here, that multiplier is ...
(1 +.08/2)^(2·8) = 1.04^16 ≈ 1.87298
Then Lana will be paying Tina ...
$8000×1.87298 ≈ $14984
at the end of 8 years.
What is the third term in the binomial expansion of (3x+y^3)^4
Answer:
The last choice is the one you want.
Step-by-step explanation:
Use the 5th row of Pascal's Triangle. Since you have a 4th degree polynomial, there will be 5 terms in it. The 5 coefficients, in order, are:
1, 4, 6, 4, 1
We will use these coefficients only up to and including the third one, since that is the one you want. Binomial expansion using Pascal's Triangle looks like this:
[tex]1(3x)^4(y^3)^0+4(3x)^3(y^3)^1+6(3x)^2(y^3)^2+...[/tex]
That third term is the one we are interested in. That simplification gives us:
[tex]6(9x^2)(y^6)[/tex]
Multiply 6 and 9 to get 54, and a final term of:
[tex]54x^2y^6[/tex]
The third term of the given binomial expansion is [tex]54(x^{2})(y^{5})\\[/tex]
What is binomial expansion?The binomial expansion is based on a theorem that specifies the expansion of any power [tex](a+b)^{m}[/tex] of a binomial (a + b) as a certain sum of products [tex]a^{i} b^{i}[/tex], such as (a + b)² = a² + 2ab + b².
How to find the third term in the binomial expansion of (3x+y^3)^4 ?We know that the binomial expansion of [tex](a+b)^{m}[/tex] can be written as [tex]mC_{0}(a^{m-0}) +mC_{1}(a^{m-1})b+ mC_{2}(a^{m-2})b^{2}+..................+mC_{m}b^{m}[/tex]So the (r+1)th term will be [tex]mC_{r}(a^{m-r})b^{r}[/tex]The given term is [tex](3x + y^{3}) ^{4}[/tex]
The third term in the expansion will be
[tex]4C_{2}(9x^{2})(y^{3})^{2}\\ = 54(x^{2})(y^{5})\\[/tex]
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Proportions in Triangles (3)
Answer:
7 6/7
Step-by-step explanation:
Parallel segment BD creates triangle BDC similar to triangle AEC. The sides and segments of similar triangles are proportional:
x/11 = 5/7
x = 55/7 = 7 6/7 . . . . . multiply by 11
Can someone help with this!? :)
The system of equations provided consists of a circle and a line:
1. [tex]\( x^2 + y^2 = 49 \)[/tex] (This represents a circle with a radius of 7, centered at the origin.)
2. [tex]\( y = -x - 7 \)[/tex] (This is a linear equation.)
The first equation has already been graphed, showing a circle with a radius of 7. To find the intersection points of the circle and the line, which are the solutions of the system, we can substitute the expression for y from the second equation into the first one:
[tex]\[ x^2 + (-x - 7)^2 = 49 \][/tex]
[tex]\[ x^2 + x^2 + 14x + 49 = 49 \][/tex]
[tex]\[ 2x^2 + 14x + 49 - 49 = 0 \][/tex]
[tex]\[ 2x^2 + 14x = 0 \][/tex]
[tex]\[ x(2x + 14) = 0 \][/tex]
This gives us two solutions for x:
[tex]\[ x = 0 \quad \text{or} \quad 2x + 14 = 0 \][/tex]
[tex]\[ x = 0 \quad \text{or} \quad x = -7 \][/tex]
Now we can substitute these x-values into the second equation to find the corresponding y-values:
For [tex]\( x = 0 \)[/tex]:
[tex]\[ y = -0 - 7 \][/tex]
[tex]\[ y = -7 \][/tex]
For [tex]\( x = -7 \)[/tex]:
[tex]\[ y = -(-7) - 7 \][/tex]
[tex]\[ y = 7 - 7 \][/tex]
[tex]\[ y = 0 \][/tex]
Therefore, the system of equations has two solutions where the line intersects the circle:
[tex]\[ (0, -7) \quad \text{and} \quad (-7, 0) \][/tex]
These calculations provide us with the step-by-step solution to the system of equations. The graphical solution would show the line [tex]\( y = -x - 7 \)[/tex] intersecting the circle [tex]\( x^2 + y^2 = 49 \)[/tex] at these two points.
Here is the graph showing the system of equations:
- The circle represented by [tex]\( x^2 + y^2 = 49 \)[/tex].
- The line represented by [tex]\( y = -x - 7 \).[/tex]
The red points indicate where the line intersects the circle, which are the solutions to the system of equations. These points are at (0, -7) and (-7, 0).
A vine maple grows fast when it is planted under the cover of cedar trees. One month after it is planted it has grown 12 inches, and after eight weeks it had grown 19 inches. Write an equation that models the growth, in inches, of the vine maple as a function of time, in weeks.
Answer:
y = (7/4)(x -4) +12
Step-by-step explanation:
The rate of growth is ...
(19 in -12 in)/(8 wk -4 wk) = 7/4 in/wk
Using this slope in a point-slope form of the equation for a line, we get ...
y = m(x -h) +k . . . . . line with slope m through point (h, k)
y = (7/4)(x -4) +12 . . . . . line with slope 7/4 through the point (4 wk, 12 in)
Please help me!
The angle of elevation of the top of a tower to a point on the ground is 61°. At a point 600 feet farther from the base, in line with the base and the first point and in the same plane, the angle of elevation is 32°. Find the height of the tower.
Answer:
573.6 ft
Step-by-step explanation:
The mnemonic SOH CAH TOA reminds you of the relationship of right triangle sides and angles:
Tan = Opposite/Adjacent
This tells us ...
tan(61°) = (height)/(distance to first point)
or
distance to first point = height/tan(61°)
Likewise, ...
distance to second point = height/tan(32°)
Then the difference of the distances is ...
distance to second point - distance to first point
= height/tan(32°) -height/tan(61°)
600 ft = height × (1/tan(32°) -1/tan(61°))
Dividing by the coefficient of height, we have ...
height = (600 ft)/(1/tan(32°) -1/tan(61°)) ≈ (600 ft)/(1.04603) ≈ 573.6 ft
Answer:
574
Step-by-step explanation:
The perimeter of a triangle with two equal sides is 50 cm. If its base were lengthened by 3 cm and each leg were shortened by 4 cm, all three sides would be equal. Find the length of the base of the original triangle.
Answer:
Base of the original triangle is 12 cm.
Step-by-step explanation:
Let base of triangle be x
two equal legs of triangles by y
therefore perimeter of triangle
x+y+y = 50 or x+2y =50
according to the question
if base is x+3 and leg is y-4
then both are equal
that is x+3 = y-4
y-x = 7 or y =x+7
x+2y =50
x+2(x+7) = 50
x+2x +14 =50
3x +14 =50
3x = 50 -14
3x = 36
x = 12
therefore base of the original triangle is 12 cm
WANT FREE 20 POINTS + BRAINLIEST?
Help me with the geometry question and I got you
Answer:
a) J, K, W
b) any of X, Y, or P
c) 1 line
Step-by-step explanation:
a) The figure shows points J, K and W on line m.
b) Any points in the diagram other than J, K, and W are not on line m. Those include points X, Y, and P. Your answer will be one or more of these.
c) Two points define 1 line. There is only one line through any given pair of points. It can be named many ways, but it is still the same (one) line.
Answer:
1) J, K, W
2) any of X, Y, or P
3) Only one line (pyx)
Step-by-step explanation:
1) The figure shows points J, K and W on line m.
2) All points in the diagram except for j, w, and k are not on line m. These include points x, y, and p. Your answer should be one or more of these.
3) Three points define 1 line. There is only one line through any given group of points. It can be named many ways, but it will remain (one) line. The line would run through the points p, y, and x.
Hope this helps
- Que
Which statement is true about the end behavior of the graphed function?
As the x-values go to positive infinity, the function's values go to negative infinity.
As the x-values go to zero, the function's values go to positive infinity.
As the x-values go to negative infinity, the function's values are equal to zero.
As the x-values go to negative infinity, the function's values go to positive infinity.
Answer:
Option D (As the x-values go to negative infinity, the function's values go to positive infinity).
Step-by-step explanation:
The graphed function shows a curve which has two turning points and three x-intercepts, which means it is a cubic polynomial. To check which statement is true, we will check all the statements one by one.
Option A) The graph shows that after the second turning point, the function starts to increase. Which means that as x-values increase, the function values will approach positive infinity. Therefore, option A is incorrect.
Option B) This option is incorrect because the graph explicitly shows that f(0) = 0, which means that when x = 0, the function value is also 0.
Option C) This option is incorrect because the function value is 0 at the x-value = 0, as shown in the graph. It can be also seen that As the x-values go to negative infinity, the function's values go to positive infinity since the value of the function decreases as the value of x decreases. Hence Option D is the correct answer!!!
Answer:
The correct option is D.
Step-by-step explanation:
Consider the provided graph of the function.
As the x values go to positive infinity or negative infinity the function value increase or goes to positive infinity.
The end behavior of the function is,
[tex]f(x)\rightarrow +\infty, as x\rightarrow -\infty[/tex]
[tex]f(x)\rightarrow +\infty, as x\rightarrow +\infty[/tex]
Now consider the provided options.
Option A is incorrect because As the x-values go to positive infinity, the function's values go to positive infinity.
Option B is incorrect because As the x-values go to zero, the function's values doesn't go to positive infinity.
Option C is incorrect because As the x-values go to negative infinity, the function's values are not equal to zero.
Option D is the correct option because As the x-values go to negative infinity, the function's values go to positive infinity.
Therefore, the correct option is D.
Suppose the circumference of a crop circle is 150.7968 hectometers (hm). What's the radius of the circle? (Use π = 3.1416.)
A. 24 hm
B. 96 hm
C. 48 hm
D. 16 hm
Answer:
A. 24 hm
Step-by-step explanation:
The formula for the circumference of a circle is ...
C = 2πr
Fill in the given values and solve.
150.7968 hm = 2×3.1416×r
(150.7968 hm)/6.2832 = r = 24 hm . . . . . divide by 2π
The radius of the circle is 24 hm.
Use the distributive property to solve the equation 3x=15?
Answer:
x = 5
Step-by-step explanation:
Ordinarily, one would not need the distributive property to solve this equation. It is quickly and easily solved by making use of the multiplication property of equality: multiply both sides of the equation by 1/3.
3x(1/3) = 15(1/3)
x = 5
___
To use the distributive property, we need the sum of two terms that have a common factor. We can get that form by subtracting 15 from both sides of the equation (subtraction property of equality):
3x - 15 = 15 - 15 . . . . subtract 15
3x -15 = 0 . . . . . . . . .simplify
Now, we can apply the distributive property to remove a factor of 3:
3(x -5) = 0
And we can use the multiplication property of equality to multiply by 1/3:
3(1/3)(x -5) = 0(1/3)
x -5 = 0 . . . . . . . . . . simplify
Finally, we can add 5 to both sides of the equation (addition property of equality):
x -5 +5 = 0 +5
x + 0 = 5 . . . . . . simplify
x = 5 . . . . . . . . . .simplify more
Answer:
X=5
Step-by-step explanation:
i believe this is the correct answer!
Evaluate 3x3 − 2x2 for x = -2.
Step-by-step explanation:
3x3-2x2
3(-2)3-2(-2)2
-6×3+4×2
-18+8
-10
I hope it will help you!
Answer:
-10
Step-by-step explanation:
Yes. All you have to remember is that double negatives result in POSITIVES.
I am joyous to assist you anytime.
Need some help with this
Answer:
y = 5x - 11
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
here slope m = 5, hence
y = 5x + c ← is the partial equation
To find c substitute (1, - 6) into the partial equation
- 6 = 5 + c ⇒ c = - 6 - 5 = - 11
y = 5x - 11 ← equation of line
A plane flies with an average velocity of -98.5 m/s for 45.0s .What is the displacement?
Answer:
-4432.5 m
Step-by-step explanation:
Displacement is measured in meters, so will be the product of velocity in m/s and time in s.
(-98.5 m/s)×(45.0 s) = -4432.5 m
___
If you're concerned with significant figures, you can round this to -4430 m, which has the required 3 significant figures.
Answer:
-4432.5 m
Step-by-step explanation:
distance (or displacement) = rate times time.
Here, the displacement is
(-98.5 m/s)(45.0 s) = -4432.5 m
What remainder does the sum 2222+2333 leave after division? Each one has an answer! Need answer quickly! 18 points!
by 4?
by 6?
by 9?
by 12?
2222 = 2220 + 2 = 555 * 4 + 2
2333 = 2332 + 1 = 583 * 4 + 1
Then
2222 + 2333 = (555 + 583) * 4 + 3
leaving a remainder of 3.
Dividing by 62222 = 2220 + 2 = 370 * 6 + 2
2333 = 2328 + 5 = 388 * 6 + 5
Then
2222 + 2333 = (370 + 388) * 6 + 7 = (370 + 388 + 1) * 6 + 1
leaving a remainder of 1.
Dividing by 92222 = 2223 - 1 = 741 * 3 - 1
2333 = 388 * 6 + 5 = (388 * 2) * 3 + 5 = (388 * 2 + 1) * 3 + 2
Then
2222 + 2333 = (741 + 388 * 2 + 1) * 3 + 1
leaving a remainder of 1.
Dividing by 122222 = 555 * 4 + 2 = 185 * 3 * 4 + 2 = 185 * 12 + 2
2333 = 2400 - 67 = 2400 - 60 - 7 = (200 - 5) * 12 - 7
Then
2222 + 2333 = (185 + 200 - 5) * 12 - 5
leaving a remainder of -5, or 7. (because 12 - 5 = 7)
Can you use the Law of Cosines in the triangle below? Why or why not?
Answer:
Yes
Step-by-step explanation:
The law of cosines relates the three sides of a triangle with the cosine of the angle opposite one of them. It is useful for finding an angle of the triangle when only the side lengths are given, as here.
The product of (a − b)(a − b) is a2 − b2.
A. Sometimes
B. Always
C. Never
The correct option is C. Never The product of (a - b)(a - b) is always equal to a² - 2ab + b².
The product of (a - b)(a - b) can be expanded using the distributive property:
(a - b)(a - b) = a(a) - a(b) - b(a) + b(b)
Simplify by multiplying the terms:
= a² - ab - ab + b²
Combine like terms:
= a² - 2ab + b²
As you can see, the product of (a - b)(a - b) is a² - 2ab + b², not a² - b².
However, there is a well-known algebraic identity called the difference of squares, which states that a² - b² can be factored as (a + b)(a - b). So, the correct statement is:
(a - b)(a - b) is equivalent to a² - 2ab + b², not a² - b².
Therefore, the answer is C. Never the product of (a - b)(a - b) is always equal to a² - 2ab + b².
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For the pair of triangles below, determine whether or not the triangles are similar. If they are similar, show your reasoning in a flowchart. If they are not similar, explain how you know.
Answer:
The triangles are similar
Step-by-step explanation:
we know that
If two figures are similar, then the ratio of its corresponding sides is proportional
step 1
In the right triangle FED
Find the length of side FD
Applying the Pythagoras Theorem
[tex]FD^{2}=FE^{2}+DE^{2}[/tex]
substitute the given values
[tex]FD^{2}=3^{2}+4^{2}[/tex]
[tex]FD^{2}=25[/tex]
[tex]FD^{2}=5\ units[/tex]
step 2
In the right triangle BUG
Find the length of side GU
Applying the Pythagoras Theorem
[tex]BG^{2}=BU^{2}+GU^{2}[/tex]
substitute the given values
[tex]10^{2}=6^{2}+GU^{2}[/tex]
[tex]GU^{2}=100-36[/tex]
[tex]GU^{2}=8\ units[/tex]
step 3
Find the ratio of its corresponding sides
If the triangles are similar
[tex]\frac{FD}{BG}=\frac{FE}{BU}=\frac{DE}{GU}[/tex]
substitute the given values
[tex]\frac{5}{10}=\frac{3}{6}=\frac{4}{8}[/tex]
[tex0.5=0.5=0.5[/tex] -----> is true
therefore
The triangles are similar
The hypotenuse of a right triangle is three times the length of one of its legs. The length of the other leg is four feet. Find the
lengths of the three sides of the triangle. For non-integer answer(s), round your answer(s) to the nearest tenth.
Answer:
Step-by-step explanation:
Let the other leg = x
x^2 + 4^2 = (3x)^2
x^2 + 4^2 = 9x^2
4^2 = 9x^2 - x^2
16= 8x^2
16/8 = x^2
x^2 = 2
x = sqrt(2)
The lengths of the sides
x = sqrt(2)
other side =4
hypotenuse = 3*sqrt(2)
x = 1.4
other side= 4
hypotenuse = 3*1.4142
hypotenuse = 4.2
Answer:
4 feet, 1.4 feet, 4.2 feet
Step-by-step explanation:
We are looking for the lengths of the three sides of a right triangle. We are given that one leg has length 4ft. Let x be the length of the other leg. Since the hypotenuse of the right triangle is three times the length of this leg, we can represent the hypotenuse as 3x. This is a right triangle, so we can use the Pythagorean Theorem to find x.
42+x216+x2=(3x)2=9x2
Subtracting x2 from both sides, then dividing by 8 to isolate the x, we have
8x2x2x=16=2=±2–√
Considering only the positive value for x, the lengths of the three sides of the triangle are approximately 4 feet, 2–√≈1.4 feet, and 32–√≈4.2 feet.
Emails arrive at the server of a company at the rate of an average of 10 per hour. It is assumed that a Poisson process is a good model for the arrivals of the emails. What is the probability (to 2 decimal places) that the time between two consecutive emails is more than two minutes?
Answer:
0.37
Step-by-step explanation:
we have given that emails arrives at the server at the rate of 10 per hour means [tex]\frac{10}{60}=0.166[/tex] per minute
we have to find the probability that the time difference between the two email is more than 2 minute
so probability [tex]P\left ( X> 2 \right )=e^{-2\lambda }=e^{-2\times 0.166}=0.7166[/tex]
The probability that the time between two consecutive emails arriving at the server is more than two minutes is 0.72 (or 72%).
Given:
- Average rate of email arrivals [tex](\( \lambda \))[/tex] = 10 per hour
1. Understanding the Poisson Process:
- In a Poisson process, the time between events (in this case, email arrivals) follows an exponential distribution.
- If [tex]\( \lambda \)[/tex] is the average rate of events per unit time (here, per hour), the time between events (interarrival time) T follows an exponential distribution with parameter [tex]\( \lambda \)[/tex].
2. Parameter Conversion:
- Since [tex]\( \lambda = 10 \)[/tex] emails per hour, we convert this to the rate per minute:
[tex]\[ \lambda_{\text{minute}} = \frac{10}{60} = \frac{1}{6} \text{ emails per minute} \][/tex]
3. Probability Calculation:
- We are interested in the probability that the time between two consecutive emails is more than two minutes.
- Let X denote the time between two consecutive emails. X follows an exponential distribution with rate [tex]\( \lambda_{\text{minute}} = \frac{1}{6} \)[/tex].
[tex]\[ P(X > 2) = e^{-\lambda_{\text{minute}} \cdot 2} \][/tex]
Substitute [tex]\( \lambda_{\text{minute}} = \frac{1}{6} \)[/tex]:
[tex]\[ P(X > 2) = e^{-\frac{1}{6} \cdot 2} \] \[ P(X > 2) = e^{-\frac{1}{3}} \][/tex]
4. Calculating the Probability:
- Use a calculator to find [tex]\( e^{-\frac{1}{3}} \)[/tex].
[tex]\[ e^{-\frac{1}{3}} \approx 0.7165 \][/tex]
Therefore, the probability that the time between two consecutive emails is more than two minutes is approximately 0.72 (rounded to two decimal places).
This result aligns with the characteristics of a Poisson process with an average arrival rate of 10 emails per hour.
What is the degree of vertex B?
Answer:
2
Step-by-step explanation:
The degree of the vertex B is 2 because from vertex B there are 2 line segments coming out of it.
Another example, C has degree 4 because from it there are 4 line segments coming from it.
Choose the correct absolute value inequality and graph for the solution -1.2≤x≤2
options:
|5x-2|>=8
|5x-2|<=8
Answer:
[tex]\large\boxed{|5x-2|\leq8}[/tex]
Step-by-step explanation:
[tex]-1.2\leq x\leq2\qquad\text{multiply all sides by 5}\\\\-6\leq5x\leq10\qquad\text{subtract 2 from both sides}\\\\-8\leq5x-2\leq8\iff|5x-2|\leq8[/tex]
[tex]cos\frac{x}{2} =[/tex]±[tex]\sqrt{\frac{1+cosx}{2} }[/tex], if A=[tex]\frac{x}{2}[/tex] then cosA=
Answer:
[tex]\cos{A}=\pm\sqrt{\dfrac{1+\cos{x}}{2}}[/tex]
Step-by-step explanation:
[tex]\cos{A}=\cos{\frac{x}{2}}=\pm\sqrt{\dfrac{1+\cos{x}}{2}}[/tex]
Apparently, you're supposed to recognize that the formula tells you the value of cos(x/2).
These long term behaviors are very hard to understand.
the first one
the degree of the polynomial in the numerator is 2.
the degree of the polynomial in the denominator is 2.
when the top and bottom have the same degree, like in this case, the horizontal asymptotes that that can afford us is simply the value of their coefficients.
[tex]\bf \cfrac{x^2-16}{x^2+2x+1}\implies \cfrac{1x^2-16}{1x^2+2x+1}\implies \stackrel{\textit{horizontal asymptote}}{y=\cfrac{1}{1}\implies y=1}[/tex]
for the second one
well, the degree of the numerator is 3.
the degree of the denominator is 2.
when the numerator has a higher degree than the denominator, there are no horizontal asymptotes, however, when the degree of the numerator is exactly 1 degree higher than that of the denominator, the rational has an oblique or slant asymptote, and its equation comes from the quotient of the whole expression, check the picture below, the top part.
for the third one
this one is about the same as the one before it, the numerator has exactly one degree higher than the denominator, so we're looking at an oblique asymptote, check the picture below, the bottom part.