1. simplify the expression. (6k^3)^3 6k^6 216k^6 216k^9 6k^27 2.you deposit $450 in an account that earns 10% compounded annually (once per year). what is the balance in your account after 4 years? round your answer to the nearest cent. $658.85 $1,980.00 $630.00 $745.25 3. solve the equation. -6 + 3x = 9 x = 5 x = 1 x = -6 x = 3 4. convert 10 qt/min to gallons per hour. 15 gal/h 150 gal/h 40 gal/h 600 gal/h