Marta recorded the temperature at 8 p. m. as 56°F and the temperature at 8 a. m. the next morning as 36°F. Marta assumed the temperature changed at a constant rate. She wrote an equation to find the number of degrees the temperature dropped each hour, h, of the night. Which equation did Marta write?

Question

Mathematics

Mathis

4 March, 11:47

Marta recorded the temperature at 8 p. m. as 56°F and the temperature at 8 a. m. the next morning as 36°F. Marta assumed the temperature changed at a constant rate. She wrote an equation to find the number of degrees the temperature dropped each hour, h, of the night. Which equation did Marta write?

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Dangelo Ochoa · Answer 1

1. Calculate how many hours passed between her temperature checks. 8 p. m to 8 a. m. is 12 hours.

2. Calculate the total change in temperature. 36 - 54 is - 18, so the temperature went down by 18 degrees.

3. We are looking for degrees per hour, so we put derees (18) over hours (12) to get 18/12.

4. Calculate by dividing. The answer is 1.5 degrees per hour.