Suppose a study is being made of the composition of 3550 families receiving public assistance. Of the first 1050 families reviewed, 18% had four or more children. If, in the remaining number of families, the percentage with four or more children is half as high as the percentage in the group already reviewed., then the percentage of families with four or more children is the entire group of familes is most nearly?

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.

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way