Question

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

What is Rachel's speed?

Answer 1

Answer: 38 meter per second

Step-by-step explanation:

Given: The variable  d models Rachel's distance from her exit (in meters) t seconds after the cameras began recording the stunt.

$d=-38t+220$

where -38 is the rate of change of function .

Since speed is the rate of change of position with respect to time , thus

Speed =-38 meter per second which shows decrease in distance with respect to time.

At t=0 second, d=220 meters

At t=1 second , $d=-38+220 =182$ meters

Distance traveled in 1 second = 220-182=38

Now, Rachel's speed=$\frac{Distance}{time}$

Rachel's speed=$\frac{38}{1}$=38 meter per second

Answer 2

Answer:

38 METERS PER SECOND

Step-by-step explanation:

Hope thIs HeLpS