Show a Fraction name for 6

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.

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b