30 employees have children studying in grade school , and 10 employees have no children at all . what is the ratio of eployees who have children studying in grade school to eployees who have no children

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 = _