1.11×10^2 divided by 2.9×10^3

Omar is going on a road trip! the car rental company offers him two types of cars. each car has a fixed price, but he also needs to consider the cost of fuel. the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of s0.50 per kilometer driven.

Bring the fraction a/a-4 to a denominator of 16-a^2

Which of the following is the best first step in solving the equation below? 4+2㏒³x=17