12.) Find the volume of the cylinder in terms of pi.

Question

anonymous · Answer

attachment

anonymous · Answer

my answer: 54 pi in. ^3. Is that correct?

anonymous · Answer

19.) A spherical balloon has a circumference of 23 cm. What is the approximate surface area of the balloon to the nearest square centimeter? 

my answer: 674 cm^2. Is that correct?

anonymous · Answer

Your first answer is correct. Well done.

anonymous · Answer

Thank you.

anonymous · Answer

For the second question, circumference is given by$$C = 2 \times \pi \times r$$Rearranging, you can determine the radius using$$r = \frac{ C }{ 2\pi } $$With the radius known, the surface area of a sphere is calculated using$$SA _{\text{sphere}} = 4\pi r^2$$

anonymous · Answer

I do not get the same answer as you did for the second question.

anonymous · Answer

@Loser66 is the answer

anonymous · Answer

415 cm^2

anonymous · Answer

Did you determine the radius?

anonymous · Answer

would the answer be in the thousands?

anonymous · Answer

The answer I get is smaller that either of your earlier answers. Can you explain how you arrived at these answers?

anonymous · Answer

Oh, I am sorry. its 168 cm^2

anonymous · Answer

Correct. Good job!