If a and s are positive integers such that (2^a)(4^s) = 16, then 2a + s =  Choose one.
A) 2 B) 3 C) 4 D) 5 E) 6
lets get the eq into simplest orm..   (2^a)(4^s) = 16..   (2^a)(2^2s) = 2^4..   or a+2s=4..   since a and s are positive integers, only a as 2 and s as 1 satisfy the Equation..   so 2a+s=2*2+1=5..   5
<result>D</result>
If a and s are positive integers such that (2^a)(4^s) = 16, then 2a + s =