exam Maths Puzzle Numerical Ability

A lawn mover repair shop borrowed $1,500 for 90 days. If the proceeds of the loan were $1,470, find the discount rate.

a. 3.75%
b. 8 1/3%
c. 4%
d. 8

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exam Other Question

I am stumped. HOw do I go about solving and graphing 4raised to the x power = 25

4^x=25 The cylinder diameter is 19 depth 1.6 at the rate of 14m3 per hr.
How many hrs. will it take to empty the pool? Thanks