Answer: The rate at which mosquitoes are appearing in a field 15 days after the rainfall ended is -171. I believe this to be correct.
M'(15) = -171 means that after 15 days, the number of mosquitoes is decreasing at a rate of 171 mosquitoes per day.
Interpreting the FunctionThe function M(t) represents the number of mosquitoes in a field after t days have passed since a major rainfall. The derivative of this function, M'(t), represents the rate of change of the number of mosquitoes.
M'(15) = -171 means that after 15 days, the number of mosquitoes is decreasing at a rate of 171 mosquitoes per day. In other words, the population of mosquitoes is declining by 171 mosquitoes each day.
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If f(x) is discontinuous, determine the reason.[tex]f(x) = \left \{ {{x^2 + 4; x \leq 1} \atop {x+4; x \ \textgreater \ 1}} \right.[/tex]a. f(x) is continuous for all real numbersb. The limit as x approaches 1 does not exist c. f(1) does not equal the limit as x approaches 1 d. f(1) is not defined
Answer:
a. f(x) is continuous for all real numbers
Step-by-step explanation:
At x = 1
Piece 1:
f(x) = 1² + 4 = 5
Piece 2:
f(x) = 1 + 4 = 5
First piece ends at (1,5)
Second piece starts at (1,5)
So no discontinuity
The volume of a right circular cone that has a height of 13 m and a base with a diameter of 3.4 m. Round your answer to the nearest tenth of a cubic meter.
Answer:39.3
Step-by-step explanation:
The volume of a right circular cone that has a height of 13 m and a base with a diameter of 3.4 m is 39.3 m^3
How to find volume of a right circular cone?Suppose that the radius of considered right circular cone be 'r' units.
And let its height be 'h' units.
Then, its volume is given as:
[tex]V = \dfrac{1}{3} \pi r^3 h \: \rm unit^3[/tex]
Right circular cone is the cone where the line joining peak of the cone to the center of the base of the circle is perpendicular to the surface of its base.
Given that right circular cone that has a height of 13 m and a base with a diameter of 3.4 m.
Volume can be calculated as;
[tex]V = \dfrac{1}{3} \pi r^3 h \: \rm unit^3[/tex]
V = 22/7×3.4×3.4×13×3.4/ 24
V = 39.3 m^3
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Bella plans to put 200 into her savings account. She can place her money into an account represented by p(x)=3x+200 or into another account represented by n(x)=200(1.04)x which account has the highest value in 4 years? Which account has the highest in 15 years?
Answer:
It’s c
Step-by-step explanation:
What kind of slope does the following line have?
+
Answer:
horizontal and vertical
Step-by-step explanation:
if its the plus?
The cylinder shown has a radius of 3 inches. The height is three times the radius. Find the volume of the cylinder. Round your solution to the nearest tenth
Answer:
254.5 Inches Cubed
Step-by-step explanation:
Formula for Finding the Volume of a Cylinder: [tex]V=\pi r^2h[/tex]
The radius is 3 inches.
[tex]r=3[/tex]
The height is three times the radius.
Multiply the radius by three to get the height.
[tex]h=3*3\\h=9[/tex]
The height is 9 inches.
Use the formula to find the volume.
[tex]\pi (3)^29= \pi (9)9=81\pi[/tex]
The exact volume is 81[tex]\pi[/tex] inches cubed.
[tex]81 * \pi[/tex] ≈ 254.47
254.47 ≈ 254.5
The volume of the cylinder should be about 254.5 inches cubed.
The length of a rectangle is 8 inches longer than half of its width.The area of the rectangle is 18 square inches.How many inches wide is the rectangle
Answer:
The correct answer is 2 inches.
Step-by-step explanation:
Let l inches and w inches be the length and width of a rectangle respectively.
According to the given problem, l - 8 = [tex]\frac{w}{2}[/tex].
Area of the rectangle is given to be, according to the question, 18 square inches.
Thus l × w = 18
⇒ l × (2l - 16) = 18
⇒ 2 [tex]l^{2}[/tex] - 16l - 18 = 0
⇒ [tex]l^{2}[/tex] - 8l - 9 = 0
⇒ ( l - 9) ( l + 1) = 0
The possible values of l are 9 and -1. As the length cannot be equal to -1, thus the value of the length is 9 inches.
Width of the rectangle is 2 inches.
What is the next term of the geometric sequence?
2,−10,50,...
Answer:
-250
Step-by-step explanation:
I don't know for sure but I hope it's correct.
Answer:
-250
Step-by-step explanation:
how to find the area of a complex shape
Answer:
B. 114 cm²
Step-by-step explanation:
You want to know the area of a complex shape consisting of a triangle and a semicircle.
Areas of PartsThe shape can be divided at the dotted line into two shapes whose areas you have formulas for:
semicircle of radius 5 cmtriangle with base 15 cm and height 10 cmUsing the formulas for their areas, we find the area of each shape to be ...
A = (1/2)πr² . . . . . . area of semicircle with radius r
A = (1/2)π(5 cm)² = 25/2π cm² ≈ 39 cm²
A = (1/2)bh . . . . . . area of triangle with base b and height h
A = (1/2)(15 cm)(10 cm) = 75 cm²
Total areaThe sum of the areas of the parts is ...
total area = semicircle area + triangle area
total area = 39 cm² +75 cm²
total area = 114 cm²
The area of the complex shape is about 114 cm².
Leah has a 22 ounce coffee. She drinks 7 ounces. Enter the percentage of ounces Leah has
left of her coffee. Round your answer to the nearest hundredth.
Answer:
The coffee Leah has left in percentage is 68.18%
Step-by-step explanation:
Given data
Total available coffee = 22 ounces
Amount She took out = 7 ounces
Let us carry out a simple subtraction arithmetic to find out the remainder
Hence remaining coffee = 22-7= 15
To expressing the remainder as a percentage we have
(15/22)*100=0.6818*100
= 68.1818%
To the nearest hundredths we have
= 68.18%
Answer: 68.18%
Step-by-step explanation:
Leah has a 22 ounce coffee and she drinks 7 ounces of the coffee. This means she will have:
22 - 7 = 15 ounces left.
The percentage of ounces of coffee Leah has left of her coffee will be the number of ounces left divided by the total number of ounces of coffee multiplied by 100. This will be:
= 15/22 × 100
= 0.6818 × 100
= 68.18%
The percentage of coffee Leah has left is 68.18%.
The triangle shown is rotated about line m. A triangle with side lengths of 6 centimeters, 8 centimeters, and 10 centimeters is shown. The triangle is rotated about line m at the side with length 8 centimeters. What is the approximate base area of the resulting three-dimensional figure? Area of a circle: A = πr2
From the information given, the area of the circle is: "113 sq. cm".
What is the formula for the area of a circle?The formula to find the area of a circle is πr².
Using the side as the radius of the circle, we can calculate the area of the base area.
Note;
r = 6
Thus,
A = π * 6²
A = (22/7) * 36
A = 3.14285714286 * 36
Hence, The area of the circle A = 113.142857143 or 113 sq. cm.
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For which value of 0 is sin 0= -1
Answer:
3/2 π
Step-by-step explanation:
If you realize that the sin is actually the y coordinate of a (unit) circle when you travel around it, you will know that it is -1 when you are 3 quarters round, assuming you started at (1,0).
The circumference is measured in radians, where one round is 2π.
So 3/4 of 2π is 3/2 π.
In degrees, the answer is 3/4 of 360°, which is 270°.
Hope that was helpful.Thank you!!!
Answer:
Step-by-step explanation:
Can someone please help me?
Sarah lost her science book. Her school charges a lost book fee equal to 75% of the cost of the book. Sarah received a notice stating that she owed the school $60 for he lost book. How much did the school pay for the book.
Answer: the school paid $80 for the book.
Step-by-step explanation:
Let x represent the amount that the school paid for the book.
Her school charges a lost book fee equal to 75% of the cost of the book. It means that the amount that the school would charge on a book that cost $x is
75/100 × x = 0.75 × x = 0.75x
Sarah received a notice stating that she owed the school $60 for he lost book. It means that
0.75x = 60
x = 60/0.75
x = $80
I will mark brainliest !!!! ANSWER PART B PLEASE (:
Answer:
The selling price of the remote control car is $36.3
Step-by-step explanation:
In this question, we are tasked with calculating the selling price of the remote control car.
From the first part of the question, we were made to know that he applies a markup of 21% and luckily for us, we are told that the expression for the retail price given the markup is 1.21 c
This means 1.21 × the cost price of the remote car
Hence, to calculate the selling price, we simply substitute $30.00 for the value of c.
The selling price is thus 1.21(30) = $36.3
Find a number which decreased by 24 equals 3 times it’s opposite
x - 24 = 3 (-1) x
x - 24 = -3x
-24 = -4x
x = 6
Step-by-step explanation:
The number which decreased by 24 equals 3 times its opposite is 6
Finding the number which decreased by 24 equals 3 timesLet x represent the number to calculate
The opposite of the number is -x.
According to the problem, we have the following equation:
x - 24 = 3(-x)
Simplifying the equation:
x - 24 = -3x
Adding 3x to both sides:
4x - 24 = 0
Adding 24 to both sides:
4x = 24
Dividing both sides by 4:
x = 6
Hence, the number is 6.
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The number part when a number and a variable are multiplied together in a term is called the _____.
Answer:
coefficient
Step by-step explanation:
Jamie and Saorise are planning a trip to Europe.
They are planning to spend 124 days on holidays, and 31 of them will be in England.
What percentage of their holiday will be spent in England?
Answer:
25%
Step-by-step explanation:
6 x 1 x 5 x 1/10 as a decimal
Answer:
30.10
Step-by-step explanation:
What is measure of angle P? Enter your answer as a decimal in the box. Round only your final answer to the nearest hundredth. ° P Q R is a right triangle. Q is a right angle. P Q is equal to eight centimeters, Q R is equal to fifteen centimeters and P R is equal to seventeen centimeters.
Given:
In ΔPQR, ∠Q = 90°
PQ = 8 cm
QR = 15 cm and
PR = 17 cm
To find the value of ∠P.
Formula
By Trigonometric ratio we get,
[tex]tan \theta=\frac{opp}{adj}[/tex]
Now let us take ∠P = θ
With respect to θ, QR be the opposite side and PQ be the adjacent side.
So,
tan θ = [tex]\frac{QR}{PQ}[/tex]
tan θ = [tex]\frac{15}{8}[/tex]
θ = [tex]tan^{-1} (\frac{15}{8} )[/tex]
θ = 61.93° (approx)
Hence, the value of ∠P is 61.93° (approx).
Answer:
61.93°
Step-by-step explanation:
Using cosine law:
15² = 8² + 17² - 2(8)(17)cosP
225 = 353 - 272cosP
cosP = 8/17
P = 61.92751306
Kevin and Ethan are employees for a company. Ethan is making a salary of $34,200. Ethan is earning a salary that is 28% lower than the salary of Kevin. What salary is Kevin earning?
Answer:
$45,000
Step-by-step explanation:
Let Kevin's Salary=x
Ethan's Salary=$34,200.
Since Ethan is earning a salary that is 28% lower than the salary of Kevin.
Ethan is earning (100-24)%=76% of Kevin's Salary.
76% of Kevin's Salary=$34,200.
0.76x=34200
Divide both sides by 0.76
x=45000
Kevin's Salary is $45,000.
Multiply (3)(−4)(2) what is the answer i need it really quick thx
Answer:
-24
Step-by-step explanation:
First multiply 4 and 3. You can just add the negative after you multiply.
Use simple multiplication facts. So
4 x 3=12
So it will be -12
Then, do the same, but with 12 and 2.
12 x 2=24
So it will be -24
Final answer:
-24
Joe wants to rent an apartment with an initial monthly rent of $1,400. He has been told that the landlord raises the rent 1.25% each year. Using an exponential function ( or a method of your own) to model this situation, calculate the rent that Joe will have to pay for the 4th year of living in the apartment.
Answer: his pay for the 4th year is $1453.16
Step-by-step explanation:
The landlord raises the rent 1.25% each year. It means that the rent is increasing in geometric progression.
The formula for determining the nth term of a geometric progression is expressed as
Tn = ar^(n - 1)
Where
a represents the first term of the sequence.
r represents the common ratio.
n represents the number of terms.
From the information given,
a = $1,400
r = 1 + 1.25/100 = 1.0125
n = 4 years
The 4th term(year), T4 is
T4 = 1400 × 1.0125^(4 - 1)
T4 = 1400 × 1.0125^3
T4 = $1453.16
Using an exponential function, the rent Joe will have to pay for the fourth year, with a 1.25% annual increase, is approximately $1,453.38.
To calculate the rent Joe will have to pay for the fourth year of living in the apartment with an annual rent increase of 1.25%, we will use an exponential function. The general formula for compounded growth is given by:
Future Value = Present Value ×(1 + rate)number of periods
In Joe's case, the Present Value is the initial monthly rent of $1,400, the rate is 1.25% or 0.0125 when expressed as a decimal, and the number of periods is 3 years since we are calculating the rent at the start of the fourth year. Plugging these values into the formula:
Rent for the fourth year = $1,400 × (1 + 0.0125)3
Let's calculate that:
Rent for the fourth year = $1,400 × (1.0125)3
Rent for the fourth year approximately = $1,400 × 1.038128
$1,453.38
Hence, Joe will have to pay about $1,453.38 for the fourth year of rent.
Bryant’s pool contains 13,000 gallons of water.
The maximum rate at which the city allows pools to be drained is 720 gallons per hour.
Write a function that represents the number of gallons of water left in Bryant’s pool t hours after he starts draining, if he drains the pool at the maximum rate.
Answer:
13000=t720
Step-by-step explanation:
720 x t = 13000
The function that represents the number of gallons of water left in Bryant’s pool t hours after he starts draining is 13,000 - 720t.
What is a Function?A function assigns the value of each element of one set to the other specific element of another set.
Given Bryant’s pool contains 13,000 gallons of water. The maximum rate at which the city allows pools to be drained is 720 gallons per hour. Therefore, the equation can be written as,
Water left = 13,000 - 720t
Hence, the function that represents the number of gallons of water left in Bryant’s pool t hours after he starts draining is 13,000 - 720t.
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its for geometry and i dont know it pls help
Hello.
The angle shown for 1 (and 3) is ∠40.
A straight line is shown, which is 180°. So the measure of ∠4 is 140°
Leah and her children went into a bakery and will buy cupcakes and brownies. Each cupcake costs $4.75 and each brownie costs $3. Leah has a total of $65 to spend on cupcakes and brownies. Write an inequality that would represent the possible values for the number of cupcakes purchased, cc, and the number of brownies purchased, b.B.
Answer:
Step-by-step explanation:
C=Cupcakes
B=Brownies
$4.75 per cupcake...(4.75c)
$3.00 per brownies..(3b)
Leah has $65 only. ([tex]\leq[/tex] 65)
4.75c + 3b[tex]\leq[/tex] 65
Your college fund has $65,000. It is currently in an account which pays 2.3% compounded monthly. How much money will you have in 15 years
Answer:
$91,749.04
Step-by-step explanation:
Lets use the compound interest formula provided to solve this:
[tex]A=P(1+\frac{r}{n} )^{nt}[/tex]
P = initial balance
r = interest rate (decimal)
n = number of times compounded annually
t = time
First, change 2.3% into a decimal:
2.3% -> [tex]\frac{2.3}{100}[/tex] -> 0.023
Since the interest is compounded monthly, we will use 12 for n. Lets plug in the values now:
[tex]A=65,000(1+\frac{0.023}{12})^{12(15)}[/tex]
[tex]A=91,749.04[/tex]
You will have $91,749.04 in 15 years.
Vicente has a prism-like water tank whose base area is 1.2 square meters. He bought 6 goldfish at the store, and the store owner told him to make sure their density in the tank isn’t more than 4 fish per cubic meter. Vicente needs to figure out how high to fill the water in the tank. What is the lowest possible height so the fish aren’t too crowded?
Answer:
1.25 m.
Step-by-step explanation:
Given,
Area of base = 1.2 m²
Number of gold fish = 6
Density of the tank should be = 4 fish/m³
Height of the tank= ?
4 fish = 1 m³
6 fish = 1.5 m³
Volume required for 6 fish is 1.5 m³
V = area of base x height
1.5 = 1.2 x h
h = 1.25 m
Hence, height of the tank is equal to 1.25 m.
Answer:
1.25
Step-by-step explanation:
The sun casts a 70 foot shadow on a 30 foot tree. Find the angle of elevation to the nearest degree.
Answer:
23°
Step-by-step explanation:
We apply Pythagorean theorem to determine the missing length, Hypotenuse:
[tex]h^2+b^2=H^2\\\\70^2+30^2=H^2\\\\H=\sqrt{5800}\\\\=76.15773\ ft[/tex]
This hypotenuse corresponds to the right triangle and the tree's height, corresponds to the angle of elevation:
-We apply the law of Sines;
[tex]\frac{a}{Sin \ A}=\frac{b}{Sin\ B}\\\\\\\frac{76.15773}{Sin \ 90}=\frac{30}{Sin\ h}\\\\h=Sin^{-1}\frac{30}{76.15773}\\\\=23.19859\approx 23\textdegree[/tex]
Hence, the angle of elevation is 23°
Can anyone help me out with this?
Find the common ratio of the geometric sequence –1,-8, -64, ...
The common ratio of the geometric sequence –1,-8, -64, ... is 8. This is calculated by dividing a term in the sequence by its preceding term and is same across all consecutive terms.
Explanation:In a geometric sequence, the common ratio is found by dividing any term by its preceding term. Here, the sequence given is –1,-8, -64, ...
Let's calculate the ratio for this series: We divide the second term (-8) by the first term (-1), which is 8. Let's check it with the next terms, where we divide the third term (-64) by the second term (-8). We find the ratio to be 8 again.
Therefore, the common ratio of the given geometric sequence –1,-8, -64, ... is 8.
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The common ratio of the geometric sequence -1, -8, -64, ... is -8, which results from dividing any term of the sequence by its preceding term.
Geometric sequence: -1, -8, -64, ...
Common ratio:
To find the common ratio, we divide each term by its preceding term.
In this case, -8 ÷ (-1) = 8 and -64 ÷ (-8) = 8.
Therefore, the common ratio is 8.