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 [tex]y=mx+b[/tex] ). 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 [tex]b[/tex] slope-intercept form. Then there is $3.75 added for every additional mile traveled, making it the slope or the [tex]m[/tex] in slope-intercept form. That makes the equation look like:
[tex]y=3.75x+3[/tex]
The [tex]x[/tex] in that equation represents how far you traveled. Therefore in order to find out 8.9 miles, plug in 8.9 for [tex]x[/tex].
[tex]y=3.75(8.9)+3[/tex]
Simply solve the equation and you will have how much it will cost to travel 8.9 miles.
[tex]y=33.375+3[/tex]
Now add the like terms:
[tex]y=36.375[/tex]
Since it needs to be rounded to the nearest cent, you will round to the nearest tenth:
[tex]y=36.38[/tex]
Therefore, it will cost $36.38 to travel 8.9 miles.
