exam Maths Puzzle Numerical Ability

A driver descended 64ft below sea level in 4 minutes. On theaverage, how many feet did he decend each minute?

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exam Other Question

I was wondering if someone could help me with his expression.

Factor and simplify, Express the answer without negative exponents.

3x(2x+5)^(-1/2) + 3(2x+5)^(1/2)

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Find the least waste in cutting 2 conical blocks from a block of wood in the form of a right circular cylinder of radius 4 inches and altitude 7 inches.Show solution and formulas.