Answer:
About 60.32 sq. in.
Explanation:
Diameter = 16
Radius is half of diameter, so radius is:
Radius = 16/2 = 8
r = 8
Jason ate 3 out of 10 slices. How much did he eat?
We will find the area of the pizza in square inches and then find (3/10)th of it to find portion Jason ate.
Area of Pizza (circle):

Now, find (3/10) of it:

Jason ate about 60.32 square inches of pizza