Question

Find the surface area of the cylinder in terms of pi .

A. 396 pi in.2

B. 522 pi in.2

C. 360 pi in.2

D. 1008 pi in.2

Answer 1

i keep getting 1639.08 ugh

Answer 2

sa = pi r ^2 + 2prh

Answer 3

don't multiply by pi. then you get (roughly) 522 pi

Answer 4

so then was this method correct? \[2pir ^{2}+2pirh?\]

Answer 5

yes you are doing it correctly.

but if you factor out the pi, you have
\[ \pi (2 r^2 +2 rh)\]
they want the answer "in terms of pi"
that means don't do the final multiplication by pi, just write number*pi
You leave it to the reader to finish the job (if they want a number without pi)

Answer 6

okay , thank you! :)