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

bahrom7893 · Answer

Yum chocolate pizza!

callisto · Answer

area of the pizza she eats = (pi) (12/2)^2 x 40/360 = 4 pi in^2
calories she eats = 4 (pi) x 30 = 377

anonymous · Answer

Haha!

anonymous · Answer

are you using arc length or arc area formula?

callisto · Answer

area of the sector $$=\pi r ^{2}  \theta/360$$

anonymous · Answer

Gotcha! I forgot to multiply by the 30. I originally get the 4. Thanks!

callisto · Answer

welcome :)