Answer:
360 in^3 (360 inches squared)
Step-by-step explanation:
Find area of each surface:
8 in*9 in=72 in^2
15 in*9 in=135 in^2
17 in*9 in=153 in^2
then, add up all the numbers:
72+135+153=360 in^3
The answer is b uh it’s 4 in the morning I hope this helped and I hope you can still answer the question
20 total
6 have average of 5 years
6 x 5 = 30
20-6 = 14
14 have average of 8 years
14 x 8 = 112
112 + 30 = 142
142 / 20 = 7.1 years