I can't find the formula of how to find the rate rather than the growth pls help

The population of a town increase exponentially at a rate of x% per year.

On Janurary 1st, 2000 the population was 50,000.

On Janurary 1st, 2015 the population was 63,000.

Find the vlaue of x (round to 3 significant figures)

What is the value of x in the following equation. -x ^3/2 = -27

Jamie went to home depot.she bought 25 bags of soil that cost $9 per bag.she bought 15 pots at $8 each,and she bought 23 bags of pebbles at $15 each.she used a coupon that gave her $5 off for every 100 dollars she spent.how much did jame pay at the end?

Three students each examine the system of linear equations shown. 8x + 4y = 16 8x + 2y = 8 caleb says there is exactly one solution. jeremy says there is no solution. kim says there are infinitely many solutions. which student is correct? provide mathematical reasoning to support your answer. answer in complete sentences. : d