50 POINTS AND BRAINLIEST!!! QUICK
3. At a zoo, the lion pen has a ring-shaped sidewalk around it. The outer edge of the sidewalk is a circle with a radius of 11 m. The inner edge of the sidewalk is a circle with a radius of 9 m.
(a) Write and simplify an expression for the exact area of the sidewalk.
(b) Find the approximate area of the sidewalk. Use 3.14 to approximate π.
Answers
R = outside radius
r = inside radius
equation: ( pi*R^2) - (pi*r^2)
B)
3.14 x 11^2 - 3.14 x 9^2
379.94 - 254.34 = 125.6 square meters
379.94 - 254.34 = 125.60 area of sidewalk
Hope it helps
Related Questions
Simplfy the expression: (x - 9)^2
Answers
Suppose the probability that a randomly selected man, aged 55-59, will die of cancer during the course of the year is startfraction 300 over 100 comma 000 endfraction 300 100,000. how would you find the probability that at least 1 man out of 1,000 of this age will die of cancer during the course of the year?
Answers
Final answer:
To assess the likelihood of at least one cancer death among 1,000 men, calculate the probability none die and subtract from one. The actuarially fair premiums for men with and without family cancer history are different, but when combined for the whole group, there's a risk of adverse selection affecting the company.
Explanation:
To find the probability that at least one man out of 1,000 aged 55-59 will die of cancer in a year, given that the probability for any one man is 300/100,000, we first find the probability that no man dies of cancer and then subtract this from 1 (the certainty). The probability that a randomly chosen man will not die from cancer in the year is 1 - 300/100,000 = 99,700/100,000.
The probability that all 1,000 men do not die of cancer is (99,700/100,000)^1,000. Subtracting this from 1 gives us the probability that at least one man out of 1,000 will die of cancer in the year:
1 - (99,700/100,000)^1,000
For the life insurance question, to calculate the actuarially fair premium for each group, we use the probability of death and expected payout. For the group with family history (20% of 1,000 men), the probability is 1/50, and for the group without (80% of 1,000 men), it's 1/200. Thus, the premiums would be:
Group with history: (1/50) * $100,000 = $2,000Group without history: (1/200) * $100,000 = $500An actuarially fair premium for the group as a whole requires weighted averaging:
Premium whole group = (20% * $2,000) + (80% * $500) = $400 + $400 = $800
If the company charges this combined premium, it faces adverse selection; higher-risk individuals are more likely to purchase insurance, driving costs up.
Cylinder a has a radius of 6 cm. Cylinder b has the same height and a radius half as long as cylinder a. What fraction of the volume of cylinder a is the volume of cylinder b what fraction of the volume of cylinder is the volume of cylinder? Explain.
Answers
Answer:
the answer is 1/4
Step-by-step explanation:
What is the factored form of 6x2 + 13x + 6? (x + 4)(x + 9) (2x + 3)(3x + 2) (2x + 6)(3x + 1) (6x + 1)(6x + 1)?
Answers
Answer: B
Step-by-step explanation:
just did on edge
In the problem · N = 1, N must be _____. the additive inverse of the multiplicative inverse of the additive identity the multiplicative identity NEXT
Answers
The value N as shown in the question must be the multiplicative identity.
Multiplicative identityThe term multiplicative identity refers to that with which a number is multiplied and the result remains that number. Multiplying a number by its multiplicative identity returns the same value.
Therefore, the the problem, we can see that the value N as shown in the question must be the multiplicative identity.
Learn more about multiplicative identity: https://brainly.com/question/514731
Answer: the multiplicative inverse of 3/4
Step-by-step explanation: its right :)
A gift bag is shaped like a rectangular prism and has a volume of 1152 cubic inches. The width of the bag is w, the length is 2w+4, and the height of the bag is 18-w (which is greater than the width). What are the dimensions of the bag?
Answers
V=(h)(l)(w)
V: It is the volumen of the rectangular prism (V=1152 inches³).
h: It is the height of the rectangular prism (h=18-w).
l:It is the lenght of the rectangular prism (l=2w+4).
2. When you substitute these calues into the formula, you obtain:
V=(h)(l)(w)
1152=(18-w)(2w+4)(w)
(18-w)(2w+4)(w)-1152=0
3. Then, you should mutiply them:
36w²-2w³+72w-4w²-1152=0
32w²-2w³+72w-1152=0
4. When you factor, you obtain:
2(w-16)(w-6)(w+6)
w1=16
w2=6
w3=-6
5. The problem says that the height is greater than the width, therefore, the widht is:
w=6 inches
6. The length is:
l=2w+4
l=2(6)+4
l=16 inches
7. And the height is:
h=18-w
h=18-6
h=12 inches
What are the dimensions of the bag?
The dimensions of the bag are:
l=16 inches
h=12 inches
w=6 inches
Final answer:
In this high school math question, you will solve for the dimensions of a gift bag shaped like a rectangular prism using the given volume and expressions for width, length, and height.
Explanation:
The volume of a rectangular prism is given by the formula V = lwh, where l is the length, w is the width, and h is the height. In this case, the volume of the gift bag is 1152 cubic inches, so we have 1152 = w(2w+4)(18-w).
Solving this equation leads to w = 8, which means the width is 8 inches, length is 20 inches, and height is 10 inches.
Therefore, the dimensions of the gift bag are 8 inches width, 20 inches length, and 10 inches height.
12 is 0.3% of what number?
Answers
Here is your answer:
The proper answer to this question is "4,000".
Your answer is 4,000!
If you need anymore help feel free to ask me!
Hope this helps!
Answer:
4,000
Step-by-step explanation:
If you see these clouds in the sky, which type of weather might you expect?
(Points : 3)
fog
no precipitation
heavy rain or snow
thunderstorms
Answers
The picture is filled with a lot of dark clouds, in which there will be a probability for thunderstorms to occur. We all know that when there is lightning, thunder will occur after it. With the photo given, there will be the probability of thunderstorm with heavy rain.
A farmer can buy two types of plant food, mix a and mix
b. each cubic yard of mix a contains 20 pounds of phosphoric acid, 30 pounds of nitrogen, and 5 pounds of potash. each cubic yard of mix b contains 10 pounds of phosphoric acid, 30 pounds of nitrogen, and 10 pounds of potash. the minimum monthly requirements are 440 pounds of phosphoric acid, 990 pounds of nitrogen, and 200 pounds of potash. if mix a costs $20 per cubic yard and mix b costs $30 per cubic yard, how many cubic yards of each mix should the farmer blend to meet the minimum monthly requirements at a minimum cost? what is this cost?
Answers
To find the minimum cost of blending the plant food mixes, set up a system of equations to calculate the quantities of each mix needed. Solve the equations to find the values of x and y, then calculate the cost using the mix prices.
Explanation:To find the minimum cost of blending the plant food mixes, we need to set up a system of equations and solve for the quantities of each mix needed. Let's let x be the number of cubic yards of mix a and y be the number of cubic yards of mix b that the farmer needs.
The total pounds of phosphoric acid required from mix a and mix b should equal the minimum monthly requirement of 440 pounds. This gives us the equation: 20x + 10y = 440.
The total pounds of nitrogen required from mix a and mix b should equal the minimum monthly requirement of 990 pounds. This gives us the equation: 30x + 30y = 990.
The total pounds of potash required from mix a and mix b should equal the minimum monthly requirement of 200 pounds. This gives us the equation: 5x + 10y = 200.
Solving this system of equations will give us the values of x and y. Once we have these values, we can calculate the cost by multiplying the quantity of each mix by their respective prices and adding them together.
Is this right???? Can someone please help?
Answers
[tex] \frac{dp}{dt} = 0.005p(300-p) = 1.5p-0.005p^2 [/tex]
[tex] \frac{d^2p}{dt^2} = 1.5 - 0.01p =0 [/tex]
[tex]-0.01p = -1.5[/tex]
[tex]p = \frac{-1.5}{-0.01} = 150 [/tex]
Now, for a logistic model, the general solution is in the form of:
[tex]p = \frac{L}{1+Ce^{-ky}} [/tex]
for
[tex] \frac{dp}{dt} = kp(L-p) [/tex]
You haven't been given the 'C' constant, so I don't have a clue as to where to go after this. Sorry, we are yet to go over logistic growth in BC class. I could take you this far by just researching. If you have further questions, I'd be happy to answer them.
x + y = 21 3y + x = 19 Which value of x is part of a solution to this system of equations?
Answers
x + y = 21
3y + x = 19
using a graph tool
see the attached figure
the solution is the point (22,-1)
the answer is
the value of x is 22
Final answer:
The value of x that is part of a solution to this system of equations is 22.
Explanation:
To find the value of x in the system of equations:
x + y = 213y + x = 19We can use the method of elimination or substitution. Let's use substitution for this example:
Solve the first equation for y: y = 21 - x.Substitute the expression for y into the second equation: 3(21 - x) + x = 19.Simplify and solve for x: 63 - 3x + x = 19.Combine like terms: 63 - 2x = 19.Subtract 63 from both sides: -2x = -44.Divide by -2: x = 22.Thus, the value of x that is part of a solution to this system of equations is 22.
PLEASE HELP ME! 50 POINTS IF YOU GET IT RIGHT!!
Darren flipped a quarter 40 times. The quarter landed on heads 65% of the time. How many times did the quarter land on tails ?
A 14
B 26
C 35
D 65
Answers
helpppppppppppppppppppppppppppppp
Answers
First we rewrite the expressions:
root (-36 * 3) -raiz (-3)
6 * root (-3) -raiz (-3)
5 * root (-3)
5 * root (3) * root (-1)
By definition:
i = root (-1)
Substituting:
5 * root (3) * i
Answer:
5 * root (3) * i
option 1
99 POINTS! NEED HELP ASAP! WILL GIVE BRAINLIEST ANSWER!
Jenny is baking three dozen cookie sandwiches for her friend’s birthday party. She plans to transport the cookie sandwiches in the same food storage container but is not sure if all 36 will fit inside of the container.
Part A: Calculate the volume of one cookie sandwich to the nearest cubic unit. Use 3.14 for
Part B: Calculate the total capacity of the food storage container to the nearest cubic unit. Use 3.14 for [tex] use 3.14 for \pi
use this equation for Parts B and A[/tex]
Part C: Given your calculations regarding the volumes in Parts A and B, do you anticipate that Jenny will be able to transport all of the cookie sandwiches in one food storage container? In two or more complete sentences, explain your reasoning.
Answers
volume = PI x r^2 x h
volume = 3.14 x 1^2 x 1.5 = 4.71in^3 = 5 in^3 ( one cookie)
B) container volume = 3.14 x 3.5^2 x 5 = 192.3in^3 = 192 in^3
C) 36 cookies x 5in^3 = 180 in^3
this is less than the volume of the container so they will all fit
Alright to solve it
Part A)
C = 1.5
F =1
You will need to solve it for volume= length times width and times height
3.14 x 1^2 x 1.5
The answer you will get is 5 in^3
Part B) Just do the same proccess as i did on the first one
CV= 192 in^3
Part C)
C=36x5in^3
So this is going to be 180 in^3 because is the less volume.
Hope this helps
Tobey
SHIFT 2: 18 25 56 42 29 38 54 47 35 30. SHIFT 2: 23 19 50 49 67 34 30 59 40 33. SHIFT 3: 19 22 24 40 45 29 33 29 39 59. SHIFT 4: 21 23 25 40 35 19 70 40 22 23. The summary statistics for all of the workers at a steel factory are shown. Four sample groups were taken from each of the four shifts. For which sample group is the mean closest to the population mean?
Answers
Shift 1 is the closest to the population mean. It is 37.4, and the population mean is 35.9.
How will buying auto insurance help you?
Answers
There are 18 girls and 12 boys in class. What is the probability that a new kid in senior class will be a boy?
Answers
18 are girls and 12 are boys, since the total is 30 students, that's the amount of probable outcomes, and since there are 12 boys, that's the amount of favorable outcomes, thus
12/30 or 0.4, 0.4 * 100 is 40%.
How can I find the measurements for this questions?
Answers
Since the trapezoid is isosceles, U = T, V = S.
a) T = 109°
b) U = 109°
C) V = 71°
Po has a frame that is 9 in x 8 in. What is the maximum area the picture can have to fit in the frame? A) 63 sq in B) 72 sq in C) 81 sq in D) 96 sq in
Answers
Answer:
B) 72 sq in
Step-by-step explanation:
The maximum size of the picture that can fit into the frame must be equivalent to the area of the shape. Given that the frame is 9 in x 8 in, it may be safe to conclude that the frame is a 4 sides plane shape, a rectangle.
The area of a rectangle is given as the product of it's length and breadth, which are 9 in and 8 in respectively. Hence, maximum area the picture can have to fit in the frame
= 9 in * 8 in
= 72 sq in
Which of the six trigonometric functions do not depend on the value of r?
Answers
Now we can construct our trigonometric ratios for our triangle as usual:
[tex]sin \alpha = \frac{y}{r} [/tex]
[tex]cos \beta = \frac{x}{r} [/tex]
[tex]tan \beta = \frac{y}{x} [/tex]
[tex]csc \beta = \frac{r}{y} [/tex]
[tex]sec \beta = \frac{r}{x} [/tex]
[tex]cot \beta = \frac{x}{y} [/tex]
As you can see the only two trigonometric functions that don't depend on the value of [tex]r[/tex] are tangent and cotangent.
A jar contains 3 red, 4 blue, and 2 white marbles. What is the probability that a marble drawn at random is not red?
Answers
Answer:
Probability that a marble drawn at random is not red = [tex]\frac{2}{3}[/tex].
Step-by-step explanation:
Given : A jar contains 3 red, 4 blue, and 2 white marbles.
To find : What is the probability that a marble drawn at random is not red.
Solution : We have given that
Red marbles = 3.
White marbles = 2.
Blue marbles = 4
Total marbles = 9
Marbles that are not red = white + blue =2+4 = 6.
Probability that a marble drawn at random is not red = [tex]\frac{Number\ of\ marbles\ not\ red}{Total\ that\ number\ of\ marbles}[/tex].
Probability that a marble drawn at random is not red = [tex]\frac{6}{9}[/tex].
Probability that a marble drawn at random is not red = [tex]\frac{2}{3}[/tex].
Therefore, Probability that a marble drawn at random is not red = [tex]\frac{2}{3}[/tex].
How do you simplify (t^2 over 3)^5 ?
Answers
Hope this helps
Btw- I used photo-math, its a app you should probably get
Find the area of the figure.
Answers
40yd x 36yd = 1440yd2
Area of the small rectangle =
20yd x 10yd = 200yd2
area of the figure = big rectangle - small rectangle
1440-200
=1240yd2
Which expressions is not a polynomial
A. z + 1
B. 2x^4 - y
C. 6 + w
D. y^2 - ^3√y + 4
Answers
An ice-cream shop sold 2.87 gallons of rocky road ice cream yesterday. The shop sold 0.449 gallons of rocky road ice cream today. What was the total amount of Rocky Road ice cream sold yesterday and today? Enter your answer, as a decimal, in the box.
Answers
There are 60 sixth graders, 50 seventh graders, and 70 eighth graders at your school. Every student gets entered in a raffle. What is the probability that an eighth-grade student will win the raffle?
Answers
Hope this helps:)
an architect created plans for a house using a scale factor of 1:16 . In the plans, the floor of the house has an area of 7 square feet. What is area of the floor in the actual house?
Answers
Answer:
The answer above me is correct
Step-by-step explanation:
Cause he big brain
Solve these simultaneous equations:
5x+2y=24 and 4x+3y=10
Answers
Substitute y to the first equation:
5x+2[(10-4x)/3] = 24
5x+[(20/3)-(8x/3)]=24
5x-(8x/3)=24-(20/3)
(15x-8x)/3=17.333
7x=17.333(3)
x=7.428
Using the second equation to find value of y:
y=(10-4x)/3; Substitute the value of x=7.428
y=[10-4(7.428)]/3
y= -6.571 (negative 6.571)
To solve the simultaneous equations 5x+2y=24 and 4x+3y=10, we use the elimination method, leading to a solution of x = 7.43 and y = -6.575.
To solve the simultaneous equations 5x+2y=24 and 4x+3y=10, we can use the method of elimination or substitution. Here, we will solve it using the elimination method.
Multiply the first equation by 3 and the second equation by 2 to make the coefficients of y equal in magnitude. This gives us 15x + 6y = 72 and 8x + 6y = 20.
Subtract the second new equation from the first to eliminate y. This gives 7x = 52.
Divide by 7 to solve for x, which gives x = 52 / 7 or x = 7.43 (approximately).
Substitute x = 7.43 back into one of the original equations to solve for y. Using the first equation, 5(7.43) + 2y = 24, we get 2y = 24 - 37.15, which simplifies to 2y = -13.15, and finally y = -6.575.
Therefore, the solution to the simultaneous equations is x = 7.43 and y = -6.575.
The area of a rectangular television screen is 3456 in^2. The width of that screen is 24 inches longer than the length. What is a quadratic equation the represents the area of the screen? What are the dimensions of the screen?
Answers
A=LxW
"A" is the area of the rectangle (A=3456 inches²).
"L" is the the length of the rectangle.
"W" is the width of the rectangle.
2. The width of the screen is 24 inches longer than the length. This can be expressed as below:
W=24+L
3. Then, you must substitute W=24+L into the formula A=LxW:
A=LxW
3456=L(24+L)
3456=24L+L²
4. The quadratic equation is:
L²+24L-3456=0
5. When you solve the quadratic equation, you obtain:
L=48 inches
6. Finally, you must substitute the value of the length, into W=24+L:
W=24+L
W=24+48
W=72 inches
7. Therefore, the dimensions of the screen are:
L=48 inches
W=72 inches
Final Answer:
Quadratic equation: [tex]\( x^2 + 24x - 3456 = 0 \)[/tex]
Dimensions: Length = 48 inches, Width = 72 inches
Explanation:
To find the quadratic equation representing the area of the screen, we first need to express the area as a product of its length (L) and width (W). Given that the width is 24 inches longer than the length, we can represent the width as [tex]\( L + 24 \)[/tex]. Thus, the equation becomes [tex]\( L \times (L + 24) = 3456 \)[/tex], which simplifies to the quadratic equation [tex]\( x^2 + 24x - 3456 = 0 \)[/tex], where x represents the length of the screen. Solving this equation yields the length x as 48 inches. Substituting this value back into [tex]\( L + 24 \)[/tex] gives the width as 72 inches. Therefore, the dimensions of the screen are 48 inches by 72 inches.
The sequence an= 27(1/3)^n-1 is graphed below. find the average rate of change between n=2 and n=4
A. - 1/4
B. 1/4
C. -4
D. 4
Answers
[tex]\bf \begin{array}{ccccccccc} &&x_1&&y_1&&x_2&&y_2\\ % (a,b) &&(~ 2 &,& 9~) % (c,d) &&(~ 4 &,& 1~) \end{array} \\\\\\ % slope = m \stackrel{\textit{average rate of change}}{slope} = m\implies \cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{1-9}{4-2}\implies \cfrac{-8}{2}\implies -4[/tex]