The temperature for the past 8 hours has been changing at the rate of -1.5 degrees each hour. The meteorologist predicts that the temperature will continue changing like this for the next 6 hours. The present reading is 0 degrees.

a. What was the temperature reading 7 hours ago?

b. What temperature is predicted for 6 hours from now?

c. When was the temperature reading 6 degrees?

d. When is the temperature expected to be -8 degrees?

Question

The temperature for the past 8 hours has been changing at the rate of -1.5 degrees each hour. The meteorologist predicts that the temperature will continue changing like this for the next 6 hours. The present reading is 0 degrees.

a. What was the temperature reading 7 hours ago?

b. What temperature is predicted for 6 hours from now?

c. When was the temperature reading 6 degrees?

d. When is the temperature expected to be -8 degrees?

SlowZasob · Answer

a. 7 hours ago the temperature was 7 * 1,5 = 10,5 degrees more, so if now it's 0, then it was 10,5 degrees 7 hours ago. 
 b. in six hours it will be 6 * 1,5 = 9 degrees less, so if it's 0 now, then it will be -9 degrees in 6 hours. 
 c. the temperature was reading 6 degrees 4 hours ago because: 
 x * 1.5 = 6 / ÷1.5 (both sides) x = 4 
 d. -8 is expected to be in 5 hours and 15 minutes because: 
 x * 1.5 = 8 / ÷1.5 (both sides) x = 5 1/3

SlowZasob · Answer

Seven hours ago, the temperature was 10.5 degrees. Six hours from now, it is predicted to be -9 degrees. The temperature was 6 degrees 4 hours ago and is expected to be -8 degrees in approximately 5 hours and 20 minutes. 
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Answer (2)

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