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ErinWeeks
 4 years ago
Find the surface area of the cone to the nearest tenth.
ErinWeeks
 4 years ago
Find the surface area of the cone to the nearest tenth.

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ErinWeeks
 4 years ago
Best ResponseYou've already chosen the best response.1A. 203 cm2 B. 1341.5 cm2 C. 747.7 cm2 D. 213.5 cm2

phi
 4 years ago
Best ResponseYou've already chosen the best response.1here is the formula http://math.about.com/od/formulas/ss/surfaceareavol_2.htm

phi
 4 years ago
Best ResponseYou've already chosen the best response.1can you match your numbers to the variable names in the formula?

ErinWeeks
 4 years ago
Best ResponseYou've already chosen the best response.1i got 441 pi but thats not right..

ErinWeeks
 4 years ago
Best ResponseYou've already chosen the best response.1i did 1/3 pi 7^2 27 .. what did i do wrong?

ErinWeeks
 4 years ago
Best ResponseYou've already chosen the best response.1ooops i did the volume formula thats why!

ErinWeeks
 4 years ago
Best ResponseYou've already chosen the best response.1this time i got 238 thats still not right ...

phi
 4 years ago
Best ResponseYou've already chosen the best response.1\[ area = \pi r^2 + \pi r s\] r is 7 and s is 27 is that what you started with ?

phi
 4 years ago
Best ResponseYou've already chosen the best response.1it looks like you did not multiply by pi

ErinWeeks
 4 years ago
Best ResponseYou've already chosen the best response.1im still getting 238 _

ErinWeeks
 4 years ago
Best ResponseYou've already chosen the best response.1i did pi*7^2 + pi 7 * 27

phi
 4 years ago
Best ResponseYou've already chosen the best response.1238 is r^2 + r*s the formula is pi r^2 + pi*r*s or pi*(r^2 + r*s)

phi
 4 years ago
Best ResponseYou've already chosen the best response.17*7 is 49 7*27 is 189 add together you get 238 no pi

phi
 4 years ago
Best ResponseYou've already chosen the best response.1can you figure out how to do it?

ErinWeeks
 4 years ago
Best ResponseYou've already chosen the best response.1for pi * 7^2 i got 153.86

ErinWeeks
 4 years ago
Best ResponseYou've already chosen the best response.1for pi * 7 * 27 i got 593.46

phi
 4 years ago
Best ResponseYou've already chosen the best response.1yes, I thought you figured it out already.

phi
 4 years ago
Best ResponseYou've already chosen the best response.1btw, you should not round to only 2 decimals, because your answer is slightly off. if you used all the digits the calculator gives you you get 747.6990516 which rounds to 747.7

ErinWeeks
 4 years ago
Best ResponseYou've already chosen the best response.1okay thank you so much for your help!!!
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