I. f(x) = 3•5^-x II. Fx) = (1/2)^x III. f(x) = -7e^x+8 identify the functions which represent exponential decay. A) I and Il only B)

I. f(x) = 3•5^-x

II. Fx) = (1/2)^x
III. f(x) = -7e^x+8
identify the functions which represent exponential decay.
A) I and Il only
B) I and III only
C)Il and Ill only
D)I, II, and II

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