SOLUTION: do exponential functions only model phenomena that grow or can they also model phenomena that decay? Explain what is different in the form of the function in each case.

Question 199800: do exponential functions only model phenomena that grow or can they also model phenomena that decay? Explain what is different in the form of the function in each case.
Answer by RAY100(1637) (Show Source): You can put this solution on YOUR website!
Exponential Growth is expressed as ,,,,,y = C(1+r)^t,,, with (1+r) >1
.
Exponential Decay is expressed as .....y= C ( 1-r)^t,,,with 1>(r-1) >0,,,or 0 .
To GROW,, the expanding fact or must be greater than 1
.
To DECAY, the factor must be less than 1, ( but larger than 0)
.
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