Let S={1,2,3,4,5,6,7,8} be a sample space with P(x)=k2x where x is a member of S,
and k is a positive constant. Compute E(S). Round your answer to the nearest hundredths.

-12 > a

step-by-step explanation:

-11 > 1 + a

subtract 1 from each side

-11 -1> 1 -1+ a

-12 > a

x is the total time in minutes for the free response

you are given number of questions as 15 - m and time per item as 8 minutes

to find x multiply the two givens together:

x = 8 * (15-m) = 8(15-m)