Answer:
Part a) The speed is 
Part b) After 4 seconds the trains is 24 ft along the track
Part c) 
Step-by-step explanation:
we have

This is the equation of a line in slope intercept form
where
s(t) is the position of a model train in feet
t is the time in seconds
Part a) How fast is the train moving?
The speed of the train is equal to the slope of the linear equation so
The slope m is equal to

therefore
The speed is 
Part b) Where is the train after 4 seconds?
For t=4 sec
substitute the value of t in the equation and solve for s

therefore
After 4 seconds the trains is 24 ft along the track
Part c) When will the train be 29 feet along the track?
For s(t)=29 ft
Substitute the value of s(t) in the equation and solve for t

subtract 14 both sides


Divide by 2.5 both sides

rewrite

The time taken is 
<h3>Distances</h3>
Given the following information:
- Distance from Neptune to Mars =

- Time is taken =

Get the time taken:
Time = Distance/Speed
Time = 
Time = 0.89 * 10^5
Time = 8.9 * 10^4hrs
Hence the time taken is 
Learn more on distance here: brainly.com/question/4931057
Well one pound is 2,000 lbs so do 2,000 / 25 = .175 of a ton!
Please Brainliest!
Answer:
240
Step-by-step explanation: