21

14. f(x) = 6 to the power of x for x = 2

15. g(t) = 2 x 0.4 to the power of t for t = -2

16. y = 20 x 0.5 to the power of x for x = 3

17. h(w) = -0.5 x 4 to the power of w for w = 18

14. 36

15. 12.5

16. 2.5

17. -34,359,738,368

Step-by-step explanation:

14.

F(2) = 6^2

= 36

15.

G(-2) = 2*.4^-2

= 2*1/.16

= 2/.16 or 1/.08 or 12.5

16.

y = 20*.5^3

= 20*.125

= 2.5

17.

H(w) = -0.5*4^18

= -34,359,738,368

a) justify

step-by-step explanation:

justifying is just part of everyday life. justify kind of means proof so i think the answer is a) justify.