The temperature in Nico’s town was negative 2 point 8 times degree F at noon. The temperature increased at a steady rate of 1 point 3 times degree F per hour until 6:00 p.m. Then, the temperature decreased by a total of 3 point 7 times degree F by midnight. What was the temperature at midnight?
Answer
A
1 point 3 times degree F
B
negative 6 point 9 times degree F
C
negative 5 point 2 times degree F
D
0 point 8 times degree F
Explanation
From noon to 6:00 p.m. is 6 hours, so the temperature increases by 1.3 × 6 = 7.8°F. Starting at −2.8°F, it reaches −2.8 + 7.8 = 5.0°F. By midnight it drops 3.7°F, giving 5.0 − 3.7 = 1.3°F, choice A.
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