Which one is a function?

What is the greatest common factor of 6a, 8a^{2}, and 14?

Students are given 3 minutes to complete each multiple-choice question on a test and 8 minutes for each free-responsequestion. there are 15 questions on the test and the students have been given 55 minutes to complete itwhich value could replace x in the table? 5507-m23-m8(15-m)8(15)-m

Solve 4 ln x=2ln25 a) x=5 b) x=25 c) x=625