Which expression is equivalent to 8a + 20? (5 points)

4(2a + 20)

4(2a + 5)

4(4a + 16)

4(4a + 5)

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 = _