Bob just got his driver's license and now he has to drive his brothers and sisters to and from school. If the ratio of brothers to sisters is 4 to 1 and he has 3 sisters, then how many brothers does Bob have?   6   12   4   What is 46 percent of 75?   35   34.5   None of the choices   What is 15 percent of 200?   25   30   15   If there are 16 students and 2 teachers, what is the ratio of students to teachers in the class?   8 to 1   1 to 8   16 to 2   Calculate the total cost you will pay for a $10 remote control car with the sales tax being 8 percent.   $108.00   $10.08   $10.80