Question 390989
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Hi
Note: 1 1/2 hr = 90min   .05*90min = 4.5
P= 0.8(1-e^-0.05t) = {{{0.8(1- 1/e^(0.05t))= .8(1- 1/e^4.5)}}}
P = {{{.8(1- 1/e^4.5)}}}
P = .8(1-1/90) = .8(89/90) = .79 or 79%