What is the amount of tax owed on a $450 laptop computer if the tax rate is 8%?

Need solving this second acceleration problem.

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?

1. how do you convert the repeating, nonterminating decimal 0. to a fraction? explain the process as you solve the problem.