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Masja [62]
3 years ago
9

Can someone tell me the answer to this please?

Mathematics
1 answer:
ahrayia [7]3 years ago
3 0

Answer:

B

Step-by-step explanation:

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The radius of a cylinder is 3.5 ft. The height is 14 ft. Find the surface area and volume of the cylinder to the nearest tenth o
ICE Princess25 [194]
Given:
radius : 3.5 ft
height : 14 ft

Surface Area of a cylinder = 2πrh + 2πr²
S.A. = 2 * 3.14 * 3.5ft * 14ft + 2 * 3.14 * (3.5ft)²
S.A. = 307.72ft² + 2 * 3.14 12.25ft²
S.A. = 307.72ft² + 76.93ft²
S.A. = 384.65 ft²  

Volume of a cylinder = πr²h
V = 3.14 * (3.5ft)² * 14ft
V = 3.14 * 12.25ft² * 14ft
V = 538.51 ft³
4 0
3 years ago
Please guys help me out with this
Kisachek [45]

When you have a negative exponent, you move the variable with the negative exponent to the other side of the fraction to make the exponent positive.

For example:

x^{-2} or \frac{x^{-2}}{1} =\frac{1}{x^2}

\frac{1}{2y^{-3}} =\frac{y^3}{2}  (you don't move the "2" because "2" has an exponent of 1, only "y" has the negative exponent)

\frac{5^{-2}}{y}=\frac{1}{(5^2)y} =\frac{1}{25y}

When you multiply a variable with an exponent by a variable with an exponent, you add the exponents together. (But you can only combine the exponents when the variables are the same)

x^2(y^3)=x^2y^3     (You can't combine them because they have different variables of x and y)

x^3(x^5)=x^{(3+5)}=x^8

y^3(y^2)=y^{(3+2)}=y^5

There's two ways you can do this. Either by first making all the exponents positive then do subtraction, or multiply them then make all the exponents positive. I'm doing the 2nd way.

2w^7u^{-2}w^{-6}*9y^{-6}*2y^9u  You can combine the numbers 2 x 9 x 2 = 36

36w^7u^{-2}w^{-6}y^{-6}y^9u    Now multiply the terms with the same variables

36(w^{7+(-6)})(u^{(-2+1)})(y^{(-6+9)})    

36(w^1)(u^{-1})(y^3)     Now make all the exponents positive

\frac{36wy^3}{u}

If you were to do subtraction, here is what you need to know:

When you divide a variable with an exponent by a variable with an exponent, you subtract the exponents together. (Reminder: they have to be the same variable in order to combine the exponents)

For example:

\frac{x^3}{x^2} =x^{(3-2)}=x^1   or  x

\frac{y^2}{y^4} =y^{(2-4)}=y^{-2}=\frac{1}{y^2}

7 0
3 years ago
The equation C = 0.20x + 50 gives the cost C in dollars for renting a truck and
k0ka [10]

Answer:

0.20 dollars/mile

Step-by-step explanation:

The slope actually has units. It has the meaning of 20 cents per mile. The units are cents per mile.

But it can also be 0.20 dollars/mile which is probably the way you should interpret it in a math class. That way it matches the units of the 50 which is for certain in dollars.

5 0
3 years ago
A particle, initially 15 m from the origin and travelling at -2 ms), accelerates at a constant rate and ends up -20 m from the o
tigry1 [53]

the general equation for velocity in terms of acceleration and displacement is: v² = v₀² + 2ax.

Solve for a: a = (v² - v₀²)/(2x).

You are given v₀ and v, and x is easy to calculate since you are given its initial and final values. The rest is just arithmetic.

(note also: SI expressions have a required space between the coefficient and the unit symbol. Thus you should have things such as “15 m” and “-2 m·sˉ¹” instead of “15m” and “-2m·sˉ¹”.)

5 0
3 years ago
What units would you use to describe the surface area of a box measured in feet?
olasank [31]
I say A. Square Inches because it is a box and it have 4 sides so that why I say it A.  
5 0
3 years ago
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