4•4 -1•1 = 16-1 = 15 square inches
Refer to the attachments...
Here's a solution for #8
Volume of a sphere = V = 4/3π r³
Your radius r = 6, so plugging that in you get:
V = 4/3π(6³)
V = 4/3π216
V = 864/3π
V = 288π (units³)
Exception if the integer is a negative
