more math questions... help please?

Question

1) in a class of 75, a professor needs to choose 4 students. how many different ways can he choose the 4 students?


2) you invest $5000 for a period of 35 months at a rate of 2.5%. at that end of the 35 months, how much money do you have?





thanks please!!!

Answer 1

75 x 74 x 73 x 72 = 29,170,800


5000 x 35/12 x .025 = 364.58
you have $5364.58

Answer 2

75C4 = 75!/(71!4!)= 1,215,450

You do not say anything about compounding. If it is compounded monthly, then:
P= 5000(1+.025/12)^35 = $5377.80