Apizza is 16 inches in diameter. each square inch of pizza has 6 calories. if each slice contains about 144 calories, how many slices is the pizza cut to with explanation

First find the area of the pizza:

area = PI x r^2
diameter = 16 inches...radius = 16 /2 =8 inches

area = 3.14 x 8^2 =  3.14 x 64 = 200.96 sq inches. Round to 201 square inches

the pizza has 6 calories per square inch so now multiple the total square inches by 6 to get total calories:

201 * 6 = 1206 total calories

now divide total calories by 144 to find the number of slices:

1206 / 144 = 8.375 so the pizza can be cut into 8 slices and each slice would have a little over 144 calories