Ken wants $1,000 sound system. he uses a credit card with 20% annual interest. if he only pay interest each month on the credit card, about how much will he pay in interest in 4 years

200

Step-by-step explanation: 1000 is your total and 20 is your percent so you multiply 1000 and 20 to get 20000 then divide it by 100 give you 200

x is the total time in minutes for the free response

you are given number of questions as 15 - m and time per item as 8 minutes

to find x multiply the two givens together:

x = 8 * (15-m) = 8(15-m)