A backpack normally costs 25 dollars but it is on sale for 21 dollars. What percentage is the discount?
1 answer:
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Answer:
4000
Step-by-step explanation:
V = 1/3(Bh) where B is the area of the base and h is the height of the pyramid
B = 20(20) = 400 h = 30
V = 1/3(400)(30) = 4000