Question

3.
The temperature at 12 noon was 10°C above zero. If it decreases at the rate of 2
hour until midnight, at what time would the temperature be 8°C below zero? What 6.
be the temperature at midnight?
​

Answer 1

Step-by-step explanation:

Let noon be time t=0 hr.,

then the temperature T in degrees Celsius at t

hr. would be:

T = 10 - 2t

Now,

To find when the temperature is 8°C below

zero,

T= -8

10 2t = -8

2t = 18

t=9

Thus, the temperature is 8°C below zero at 9:00

pm.

To find the temperature at midnight,

use t = 12:00

T = 10 - 2(12) = 10 - 24 = -14 =

Thus, the temperature at midnight is 14°C belo

zero.

Hope this helps you...,

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