AM-1581

Exponential and logarithmic models

A Math · Secondary 4 · Easy · Exponential and logarithmic models

The temperature

\theta\,^{\circ}\text{C}

of a drink

t

minutes after it is poured is modeled by

\theta = 20 + 50e^{-0.1t}

. What is the temperature after

15

minutes, correct to 1 decimal place?

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