Xer-wise markets and promotes its products to consumers over the internet. melody and tom are considering a more aggressive approach to generate enthusiasm for the musclemaster over the internet. they have discussed offering young adults free t-shirts and special discounts on xer-wise equipment if they will agree to hype the benefits of the musclemaster in internet chat rooms. they are even considering setting up a program in which customers get commissions for directing friends to the xer-wise website. if they adopt these strategies, tom and melody would be utilizing:

In a high school with 3000 students, counselors are putting together a math tutoring program for the neighboring middle school. they plan to invite high school students with high average test scores to tutor middle school students, and they would like to offer gift cards to the student tutors. the counselors have a spreadsheet showing each student’s average test scores, and in order to find out how many gift cards they should purchase, the counselors need to count how many students would qualify to become tutors. which type of function would best the counselors determine the number of eligible students?