The amount of money it takes to fill up a gas tank varies directly with the number of gallons bought. it cost $21.87 to fill up a car with gasoline with 9 gallons of gasoline. what is the constant of variation? a) 0.41 b) 9 c) 2.43 d) 21.87

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 legs of a right triangle measure 6 meters and 8 meters. what is the length of the hypotonuse.

The amount of data left on the cell phone six gb for 81.5 gb of data is used how much data is available at the beginning of the cycle