Idon’t under stand what this is asking! -geometry honors-

Students are given 3 minutes for each multiple-choice question and 5 minutes for each free-response question on a test. there are 15 questions on the test, and students are given 51 minutes to take it.how many multiple-choice questions are on the test?

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,

Arational number that is equivalent to -20/4?