Question

Terry is skiing down a steep hill. Terry's elevation
E(t)
in feet after t seconds is given by
E(t) = 4500 − 80t.
Write a complete sentence describing Terry's starting elevation and how it is changing over time.

Answer 1

does it ascend or descend

Answer 2

terry's elevation is descending as more time goes on

Answer 3

plug in values for t

Answer 4

then see if it ascends or descends

Answer 5

i don't know how to do that

Answer 6

and i need to insert the feet and feet per second

Answer 7

4500- 80t t is the time in seconds. time always increases and can never be negative
4500- 80(1) is the elevation after 1 second
4500- 80(2) is the elevation after 2 seconds ans son

Answer 8

**and so on**

Answer 9

so what do i put or need to do

Answer 10

you have to Write a complete sentence describing Terry's starting elevation and how it is changing over time.


Terry's starting elevation is 4500- 80(0)=4500, since 0 seconds passed since she started skiing down the hill.

Terry's elevation is decreasing or descending as time goes on. this can be seen after 5 seconds since terry started going skiing down the hill: 4500- 80(5)= 4100.

4100(elevation after 5 seconds) < 4500(starting elevation) and so her elevation is decreasing or descending

Answer 11

hope that helps

Answer 12

still confused.

Answer 13

ddid you see the picture i attached.

Answer 14

oh

Answer 15

To find the rate or feet per second use Distance = Rate*time or d=rt

Answer 16

She starts at a feet of 4500

Answer 17

so would i put that in on the first thing

Answer 18

yes

Answer 19

she goes down 80 feet per second

Answer 20

so that means it descends ?

Answer 21

yep

Answer 22

Find the coordinates of the midpoint of the line segment that joins the two given points.
(x, y) = (−53, 19)
and
(x, y) = (19, −38)

Answer 23

Midpiont formula : ((x1+x2)/2, (y1+y2)/2)

Answer 24

plug in the values