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JulijaS [17]
3 years ago
11

How do you find surface area of a cylinder?

Mathematics
2 answers:
Wittaler [7]3 years ago
5 0
Idk I need help too pls comment
Vlad1618 [11]3 years ago
4 0
A= 2pi(radius)(height)+2pi(radius)^2 
Mark me as brainiest! <3
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Let f(x) = 1/x . Find the number b such that the average rate of change of f on the interval [2, b] is − 1/8
vekshin1

Answer:

b=4

Step-by-step explanation:

So, we have the function f(x)=1/x. We need to find b such that the average rate of change or the slope is -1/8 between the intervel [2, b]. First, let's find f(2).

f(2) = 1/(2) = 1/2

So, we have the point (2, 1/2)

At point b, f(b) = 1/b.

Let's plug this into the slope formula:

\frac{y_2-y_1}{x_2-x_1}=\frac{.5-\frac{1}{b} }{2-b}  =-1/8

Now, we just need to solve for b. First, let's multiply both the numerator and denominator by b (to get rid of the annoying fraction in the numerator).

\frac{.5b-1}{2b-b^2} =\frac{-1}{8}

Now, cross multiply.

4b-8=b^2-2b

b^2-6b+8=0

Solve for b. Factor using the numbers -4 and -2.

=(b-4)(b-2)=0

Thus, b=4 or b=2.

However, b=2 is not a possible solution since the interval [2,2] means nothing. Thus, b=4.

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2 years ago
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Gina wrote the number 43,628. Then she used the same digits to write a new number. In the new number, she moved the digit 6 one
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The 1,000s place because she was in the 100s and you moved 6 to the left which makes the number higher.
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Which of the following phrases describes a way colons should not be used?
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Answer:

make sure that sentence that comes before the colon is a complete,  sentence

Step-by-step explanation:

One way to test whether you have used a colon correctly is to delete the information after the colon.

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