Solve subtraction word problems with variables.

get marked brainiest if your the first to be correct. you also get 30 points from this question.

if 36 of the total of 42 skydivers have jumped out of the plane already, how many more skydivers still need to jump?
s = __ skydivers

33% of college students say they use credit cards because of the rewards program. you randomly select 10 college students and ask each to name the reason he or she uses credit cards. find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive. if convenient, use technology to find the probabilities.

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

How many zeros does this polynomial function, y=(x-8)(x+3)^2