The temperature in Frostport is 8F and dropping at the rate of 3.5 degrees per hour. How many hours will it be until the temperature is - 20 F

Answer: - 20 degrees in 8 hrs

Step-by-step explanation: If the temperature is 8 degrees, after 1 hr, it would be 4.5 degrees, after 2 hr, it would be 1.0 degrees, after 3 hr, it would be - 2.5 degrees, after 4 hr, it would be - 6.0 degrees, after 5 hr, it would be - 9.5 degrees, after 6 hr, it would be - 13.0 degrees, after 7 hr, it would be - 16.5 degrees and after 8 hr, it would be - 20 degrees.