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Rachel is a stunt driver, and she's escaping from a building that is about to explode! DDD represents Rachel's remaining distance (in meters) as a function of time ttt (in seconds). D=-38t+220D=−38t+220D, equals, minus, 38, t, plus, 220 What is Rachel's speed?

Respuesta :

lublana

Answer:

38 m/s

Step-by-step explanation:

We are given that

D represent Rachel's remaining distance( in meters ) as  a function of time is given by

[tex]D=-38t+220[/tex]

We have to find the Rachel's speed.

We know that

[tex]Velocity=\frac{ds}{dt}[/tex]

Substitute the values then we get

[tex]v=\frac{d(-38t+220)}{dt}=-38 m/s[/tex]

[tex]Speed =\mid v\mid[/tex]

[tex]Speed =\mid -38\mid =38m/s[/tex]

Hence, the Rachel's speed is given by =38 m/s

Answer:

38

Step-by-step explanation: