If 1+4=5; 2+5=12; 3+6==21; what is 8+11

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.

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?

Convert the density of surface sea water to metric tons/cubic meter