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OpenStudy (anonymous):
Pyramid A is a square pyramid with a base side length of 18 inches and a height of 9 inches. Pyramid B has a volume of 3136 cubic inches. How many times bigger is the volume of pyramid B than pyramid A? What is the percent change from pyramid A to pyramid B? Provide an explanation and proof for your answer to receive full credit
OpenStudy (anonymous):
Pyramid A's formula is 1/3(base)(height). V=1/3(18)(9)=54 cubic inches. The volume of Pyramid B is 3136 cubic inches.
OpenStudy (anonymous):
Did I do pyramid A's equation right?
OpenStudy (anonymous):
No you only took the length of a side not the base
OpenStudy (anonymous):
Becuase then 3136/54= 58.07
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OpenStudy (anonymous):
Take the total area of the base which is 18 times 18
OpenStudy (anonymous):
oh i have to square it?
OpenStudy (anonymous):
Yeah!
OpenStudy (anonymous):
so its 972
OpenStudy (anonymous):
then divide volume of Pyramid B by 972 and you're good!
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