<span> Just plug in the value of b=3 in 4b^4, then you solve it, and your answer is 324</span>
Let y be the total cost and x be the miles taken:
y = 0.30x + 35
35 is a fixed cost. No matter how many miles you drive the car you will still need to pay $35
.30 is a cost that depends on the miles taken (x).
Hope this helped!
~Just a girl in love with Shawn Mendes
The answer to this is 7.5.