Athermometer reading 100◦f is placed in a medium having a constant temperature of 70◦f. after 6 min, the thermometer reads 80◦f.
what is the reading after 20 min?

70.00143

Step-by-step explanation:

Given that a thermometer reading 100◦F is placed in a medium having a constant temperature of 70◦F. After 6 min, the thermometer reads 80◦F.

We know that Newton law of cooling has formula as

where Ts is room temperature and To is initial temperature.

Using the fact that when t =6, T (6) = 80

T0 = 100 and Ts =70 we can find k

Using this we find temperature when t=20

y=mx+

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