Question

(a)
5. The temperature at 12 noon was 10°C above zero. If it decreases at the rate of 2
per hour until midnight, at what time would the temperature be 8°C below zero
What would be the temperature at mid-night?
(b)​

Answer 1

Answer:

here is your answer mate...

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 below zero.

Hope this helps you...,

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Answer 2

Answer:

Here is your answer ....

Step-by-step explanation:

A.T.Q

The temperature at noon was 10degree celcius

In 1 hour it decreases 2 degree

In 12 hours it decrease 12*2= 24 degree

The temperature at midnight is 24 - 10 = 14 degrees

Then next ,

The temperature at will be at 8 degree celcius below zero is 10 +8 = 18 degrees

A.T.Q

2 degree celcius take 1 hour

1 degree celcius will take 1/2

18 degree celcius will take 1/2 x 18 = 9

So , in 18 degree celcius temperture the time will be 9pm.

I hope my answer will be useful to U