Question

6. A certain freezing process requires that room temperature be lowered from 45°C at the rate of 4°C every hour. What will be the room temperature 10 hours after the process begins?

Answer 1

Answer:

5°

Step-by-step explanation:

4° x 10 = 40°

45° - 40°

Answer 2

Answer:

5°C

Step-by-step explanation:

We need to find a rate. 4° an hour for 10 hours.

Step 1: Find the amount that needs to be multiplied by the hour.

In this case it is 4° × 10 hr.

Step 2: Multiply

We do this to make it easier to subtract from 45°

4° × 10 hr. = 40

Step 3:  Subtract 45° from 40.

We do this because to find the change in temperature we have to subtract from the previous temperature.

45° - 40 = 5°C

Step 4: Check your answer

We do this to get the best eligible answer

40 + 5= 45

Your final answer : 5°C

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