How do you solve 9!/5! ?

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?

What does the relationship between the mean and median reveal about the shape of the data

Write the expression as a single natural logarithm. 2 in a - 4 in y