Kelly loves to eat chocolate pizza. Each square inch of chocolate is 30 calories. She orders a slice of chocolate pizza from a pizza with a diameter of 12 inches that is cut with a central angle of 40 degrees. How many calories does she eat?

about 3,393 calories

about 113 calories

about 13 calories

about 377 calories

Question

Kelly loves to eat chocolate pizza. Each square inch of chocolate is 30 calories. She orders a slice of chocolate pizza from a pizza with a diameter of 12 inches that is cut with a central angle of 40 degrees. How many calories does she eat? 

 about 3,393 calories 

 about 113 calories 

 about 13 calories 

 about 377 calories

anonymous · Answer

@amistre64 
@ganeshie8

amistre64 · Answer

the area of a circle is 1/2 the angle times the radius^2

amistre64 · Answer

well, the radians of the angle that is

amistre64 · Answer

when that angle is 360 (2pi)

2pi/2 * r^2 = pi r^2

anonymous · Answer

r=6

amistre64 · Answer

angle/180 defines the coefficeint for k pi radians

anonymous · Answer

what do want me to do

amistre64 · Answer

find that area of the slice of course

amistre64 · Answer

$$\frac12\frac{\theta}{180}\pi~r^2$$

amistre64 · Answer

then multiply that by 30 calories

anonymous · Answer

0.5*180/12

amistre64 · Answer

$$\frac12\frac{\theta}{180}\pi~r^2$$
$$\frac12\frac{40}{180}\pi~6^2$$
$$\frac{20}{180}\pi~36$$
$$\frac{20}{10}\pi~2$$
$$2*2pi * 30~calories$$

anonymous · Answer

how do I put 2pi in the calculator

blurbendy · Answer

2 times the pi button (you should have a pi button on your calculator)

amistre64 · Answer

pi is roughly 3.14159

anonymous · Answer

i got 376.99

goldphenoix · Answer

Which is very close to which answer choices?

anonymous · Answer

D the last one

goldphenoix · Answer

Correct, flexx. :)
I hope amistre helped you. :)

anonymous · Answer

she did very well to

goldphenoix · Answer

Flex, give amistre the medal.

goldphenoix · Answer

I didn't really help you with anything. >_>

amistre64 · Answer

ive got enough medals :)

goldphenoix · Answer

You can never have enough medals. :3

anonymous · Answer

i give who help and u my friend help too

anonymous · Answer

I deserve a medal too

anonymous · Answer

Meredith works at a horse stable. Her job is to exercise the horses. The stable has a circular area that Meredith runs the horses within. The diameter of the fencing is 16 yards. What is the length of the fence? 

 16π yards 

 4π yards 

 16 yards 

 4 yards

anonymous · Answer

thanks but i already had it answered buddy

anonymous · Answer

need help with this one

anonymous · Answer

Meredith works at a horse stable. Her job is to exercise the horses. The stable has a circular area that Meredith runs the horses within. The diameter of the fencing is 16 yards. What is the length of the fence? 

 16π yards 

 4π yards 

 16 yards 

 4 yards

goldphenoix · Answer

Maybe post this new question?

anonymous · Answer

i did