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A. 203 cm2
B. 1341.5 cm2
C. 747.7 cm2
D. 213.5 cm2

here is the formula
http://math.about.com/od/formulas/ss/surfaceareavol_2.htm

can you match your numbers to the variable names in the formula?

i got 441 pi but thats not right..

i did 1/3 pi 7^2 27 .. what did i do wrong?

ooops i did the volume formula thats why!

this time i got 238 thats still not right ...

\[ area = \pi r^2 + \pi r s\]
r is 7 and s is 27
is that what you started with ?

it looks like you did not multiply by pi

im still getting 238 -_-

i did pi*7^2 + pi 7 * 27

238 is r^2 + r*s
the formula is pi r^2 + pi*r*s
or pi*(r^2 + r*s)

7*7 is 49
7*27 is 189
add together you get 238
no pi

can you figure out how to do it?

okay i get that

for pi * 7^2 i got 153.86

for pi * 7 * 27 i got 593.46

so would it be C ???

yes, I thought you figured it out already.

okay so it is C?

okay thank you so much for your help!!!

yw