Question

In Antartica the temperature can change drastically between day and night. At 3:00 pm, the tempature was a chilly 7 degrees Celsius. At that time, it began to drop at steady rate of 6 degrees Celsius every hour. At what time was the temperature -5 degrees Celsius?

Answer 1

Step 1: Let x represent the hours it will take to be at -5 degrees.

Step 2: Create the equation, 7-6x= -5

Step 3: Solve it. You will get x=2

Step 4: That means after 2 hours it will be -5 degrees, which means at 5:00 it will be -5 degrees.