8 times 10 to the power of -3 is how many times as great as 4 time 10 to the power of -6

Which expression is equivalent to? assume x > 0 and y > 0.

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.

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?