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3 years ago

12

A ballon has a circumference if 11cm. Use the circumference to approximate the surface area of the balloon to the nearest square

centimeter

2 answers:

lesya [120]3 years ago

7 0

11cm x 3.14 pie helpful?

Oksana_A [137]3 years ago

3 0

Answer:

Step-by-step explanation:

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2 years ago

Read 2 more answers

A ladder is leaning against a wall. The top of the ladder is 9 feet (ft) above the ground. If the bottom of the ladder is moved

Komok [63]

Step 1

<u>First situation</u>

when a ladder is leaning against a wall

Let

x-------> the distance of the bottom of the ladder from the wall

L-------> the length of the ladder

<u>Find the length of the ladder</u>

Applying the Pythagorean Theorem

$L^{2} =x^{2}+ 9^{2}$ ------> equation $1$

Step 2

<u>Second situation</u>

when the ladder will be lying flat on the ground

<u>Find the length of the ladder</u>

In this situation the length of the ladder is equal to

$L=x+3$

square both sides

$L^{2}=(x+3)^{2}$ ------> equation $2$

Step 3

equate equation $1$ and equation $2$

$x^{2}+ 9^{2}=(x+3)^{2}\\x^{2}+81=x^{2} +6x+9\\ 6x=81-9\\6x=72\\x=12\ ft$

therefore

<u>the answer is</u>

the length of the ladder is $12\ ft$

see the attached figure to better understand the problem

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3 years ago

(-12)^9 negative or positive

g100num [7]

(-12)^9 is a negative because a negative times a positive is negative. The answer to (-12)^9 is -5159780352.
Hope you learned something :)

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2 years ago