Please explain how to do this

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

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.

What is the measure of angle x? a.101 b.158 c.44 d.79