Find the volume of the composite solid. round your answer to the nearest hundredth.
a. 702.00 in3
b. 1218.03 in3
c. 676.01 in3
d. 811.51 in3

We will first find the volume of the base:
V 1 = 9² · 5 = 81 · 5 = 405 in³
Then the volume of the upper solid - pyramid. We must find the height of the pyramid:
h² = 11² - 4.5² = 121 - 20.25 = 100.75
h = √100.75
h = 10.037429
V 2 = 1/3 · 9² · 10.037429 = 271.01
Finally, the volume of the composite solid:
V = V 1 + V 2 = 405 + 271.01 = 676.01
C. 676.01 in³