Question

Rachel is a stunt driver, and she's escaping from a building that is about to explode! The variable ddd models Rachel's distance from her exit (in meters) seconds after the cameras began recording the stunt. d=-38t+220d=−38t+220d What is Rachel's speed?

Answer 1

Answer: 38 meters

My explanation: they said that was the answer lol

Answer 2

38 meters per second

Explanation:

We have been given that Rachel is a stunt driver, and she's escaping from a building that is about to explode! In equation
`d=-38t+220`, the variable d models Rachel's distance from her exit (in meters) seconds after the cameras began recording the stunt. We are asked to find the Rachel's speed.

We can see that the slope of the given equation is negative 38. Since Rachel is escaping from the building, so distance is decreasing 38 meters per second.

We can see that 220 is initial value that represents initial distance.

Since distance is decreasing 38 meters per second, so Rachel is traveling at a rate of 38 meters per second.

Therefore, Rachel's speed is 38 meters per second.