The number 9 in scientific notation is 8•10^0
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My answer is in the photo above
Answer:
I would say that the answer is 4/20
2.8 multiplied by 2.8 to find the surface area of the base which is 7.84
4*1/2*2.8*5.5 to find the surface area of all four triangular faces which is 30.8
Plus them together 7.84 plus 30.8 which is 38.64