A triangular prism has a height of 9 meters and a triangular base with the following dimension. What is the surface area of the prism?
O 420 m 2
O 324 m 2
O 504 m 2
O 372 m 2

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Ineed with number 6 , explain how to get 1978

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?