Bill is 4 years older than Jill and 2 years younger than David. If Jill is 12, then what is the percent of years she is older than David?   18 to 12   None of the choices   9 to 6   If there are 16 students and 2 teachers, what is the ratio of students to teachers in the class?   16 to 2   1 to 8   8 to 1   What is 15 percent of 200?   30   25   15   What is 51 percent of 492?   10.36   None of the choices   250.92   Calculate the total cost you will pay for a $10 remote control car with the sales tax being 8 percent.   $10.08   $108.00   $10.80