7. A pizza has a diameter of 18 inches. It is
then cut into eight equal pieces. About how
many square inches is each slice of pizza?

31.8 in^2 per slice

Step-by-step explanation:

to get the radius (r) you divide the diameter (d) by 2, so its 18/2 which is 9, then you plug 9 into the formula for a circle

A=πr2=π·92≈254.469

thats the area for the whole pizza, then you divide that by 8 (for the 8 slices) which is 254.47/8, which gives you 31.80875

31.80875  rounds to 31.8 in's, but you have to make sure its in^2 because its area