Question

Medal for help :)
Starting from 1.5 miles away a car drives towards a speed checkpoint and then passes it. The car travels at a constant rate of 53 MPH .The distance of the car from the checkpoint is given by d=(1.5-53+) At what time is the car 0.1 miles from the checkpoint -Calculate your answers in seconds
Choices below

Answer 1

d=|1.5−53t|
where d is in miles and t is in hours. first divide both sides by 53 to get:
d53=|1.553−t|
this can be split into two portions: (1) for t <= 1.5/53 hours we can write:
d53=1.553−t
t=1.5−d53
(2) for t > 1.5/53 hours we can write:
d53=−(1.553−t)=t−1.553
t=1.5+d53
now just stick the value d=0.1 into (1) and (2) above to get your answer (remember to multiply the answers you get by 3600 to convert hours to seconds).

Answer 2

http://openstudy.com/study#/updates/4ec9fac7e4b09553999ab150

Answer 3

@JuniorEinstein1

Answer 4

@Ail.A I'm getting Answer A

Answer 5

post me your answers

Answer 6

and bump the ?

Answer 7

I don't get it

Answer 8

how?