Mrs. Tart takes a survey in class. She discovers 60% of her students prefer using pens over pencils in class. If 12 students in Mrs. Tart’s class prefer to use pens, how many total students are in Mrs. Tart’s class?

Consider this expression and the steps to evaluate it. 4^5(−2)^9/4^8(−2)^3 1. apply the quotient of powers:      (−2)^a/4^b 2. evaluate powers:           c/d select the value of each variable. a = _ b = _ c = _ d = _