Question

Juan is rappelling down a 495-foot cliff. He moves down the cliff at a rate of 6 feet per second. Which equation would represent the height Juan is above the ground, H, after t seconds?

Answer 1

Where he started (495) minus 6 feet per second (-6t) till he gets to the ground (=h)
Put them together: 495-6t=H :) 
Hope that helps

Answer 2

Answer:

The temperature began changing at the rate of −2.5°F per hour.

Step-by-step explanation:

Number of hours from 7PM to 10PM =10-7=3. The total change in temperature in 3 hours = 3\times ...