10, 9, 4, 7, 5.5 the range for this data is

What are the values of each variable in the diagram below?

Me d is also an option but i couldn't get it in the picture

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 = _