Answer:
It will cost $36.38 to travel 8.9 miles.
Step-by-step explanation:
In order to get how much it will cost to travel 8.9 miles, you need to first set up a linear equation (in slope-intercept form, which is
). You can do this with what the problem has given us. Since there's a flat fee of $3, that is the y-intercept or the
slope-intercept form. Then there is $3.75 added for every additional mile traveled, making it the slope or the
in slope-intercept form. That makes the equation look like:

The
in that equation represents how far you traveled. Therefore in order to find out 8.9 miles, plug in 8.9 for
.

Simply solve the equation and you will have how much it will cost to travel 8.9 miles.

Now add the like terms:

Since it needs to be rounded to the nearest cent, you will round to the nearest tenth:

Therefore, it will cost $36.38 to travel 8.9 miles.