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Mathematics 12 Online
OpenStudy (trwatkins1):

check my answer please

OpenStudy (trwatkins1):

What is the exact area of a circle with a diameter of 18 feet? A. 36π square feet B. 81π square feet <----- C. 324π square feet D. 1296π square feet

rishavraj (rishavraj):

radius = diameter/2 area = pi(r)^2

OpenStudy (mudkillz):

Isn't it the radius squared time pi?

OpenStudy (mudkillz):

Dang, guess I got that right.

OpenStudy (trwatkins1):

well the othe answer i got was in 1046

OpenStudy (trwatkins1):

1017*

rishavraj (rishavraj):

howz tht possible??? @trwatkins1

OpenStudy (trwatkins1):

18*2*3.14

rishavraj (rishavraj):

see the diameter given is 18 so radius = 9 and area = \[\pi \times (9)^2\]

OpenStudy (trwatkins1):

...

OpenStudy (trwatkins1):

can u write in in expanded form im dumb :p

rishavraj (rishavraj):

whts the value of 9^2 ???

OpenStudy (trwatkins1):

9*2?

OpenStudy (trwatkins1):

18

rishavraj (rishavraj):

not 9*2 its 9^2 @Mudkillz 9*2 = 18 9^2 = 81

OpenStudy (trwatkins1):

oh

OpenStudy (k12awesomeness):

it's 9 to the second power, which would be 81

OpenStudy (mudkillz):

Sry that was me being dumb 9*9 is 81 and so is 9^2

rishavraj (rishavraj):

\[9^2 = 9 \times 9 = 81\]

OpenStudy (trwatkins1):

OH

OpenStudy (trwatkins1):

OMFG IM BLIND

OpenStudy (trwatkins1):

rip

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