Answer:
s(3) = 42
Step-by-step explanation:
if t = 3 then...
s(3) = 15 (3^3) - Given now all we need to do is simplify
s(3) = 15 + 27 - add like terms (15 + 27)
s(3) = 42 - the answer :D
Mark brainlesit if this helped!