Answer:
240
Step-by-step explanation:
The average rate of a function f(x) is interval [a,b] is given by :-
R = (f(b) - f(a)) / (b-a)
Now, the given function : F(x) = 4(5)^x
Interval : [1,3]
Now, the average rate of change over the interval [1, 3] is given by :-
R = F(3) - F(1) / (3 - 1)
= 4(5)^3 - 4(5)^1 / 2
= 4(5^3 - 5) / 2
= (4(125 - 5) / 2) = 240
Hope It helped
