Question 1078899
The temperature, A(t), at time, t, of a body is given by:  A(t)=70+30e^-t

a)calculate the value of t when A(t)=70.55
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A(t) = 70+30e^-t = 70.55
30e^-t = 0.55
e^-t = 0.55/30
e^t = 30/0.55
t = ln(30/0.55)