Answer: 0.19b+950
Step-by-step explanation:
0.19(b+5000)
0.19*b=0.19b
0.19*5000=950
0.19b+950
The area of a trapezoid is:

A = area
a = base 1
b = base 2
h = height
Area = unknown
base 1 = 2.5
base 2 = 7.5
height = 2.5
^^^Plug these numbers into the formula!

A = (10/2)(2.5)
A = (5)(2.5)
A = 12.5
Hope this helped!
It'll be the third one because he stops to shop for a bit, then goes straight home.