exam Maths Puzzle Numerical Ability

x squared times the cube root of (1/x^15 y^8)

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exam Other Question

Debbie traveled by boat 4 miles upstream to fish in her favorite spot. Because of the 5-mph current, it took her 40 minutes longer to get there than to return. How fast will her boat go in still water? (Round the answer to one decimal place.) 3 times the first of 3 consecutive numbers is 4 more than 2 times teh second.