Question

At 7:00 a.m., the temperature was 8°C. What was the temperature at midnight if the temperature was 10° lower? Incorrect answer

A. −18° C Correct answer
B. −2° C Incorrect answer
C. 2° C Incorrect answer
D. 18° C

Answer 1

b)−2° C

Explanation:

hello! To solve this problem you should remember how are the operations with negative numbers, for this the only thing we must do is make a subtraction between the initial temperature (8° C) and the negative change of temperature (10° C)

Ti= initial temperature =8° C

ΔT= temperature change =10° C

new temperature=Ti-ΔT

new temperature=8° C-10° C=-2° C

in conclusion the answer is -2° C