1. They want me to evaluate the expression using the values given in table for (fog)(4)

x | 1,5,11,12

f(x)|-4, 11, 3, 15

x |-5, -4, 1, 4

g(x)|1, -7, 5, 11

2.Solve the equation

4^7-3x=1/16 (I know this has something to do with logs, but i dont know what)

3.While traveling in a car, the centrifugal force a passenger experiences as the car drives in a circle varies jointly as the mass of the passenger and the square of the speed of the car. If the passenger experiences a force of 352.8 newtons when the car is moving at a speed of 70 kph and the passenger has a mass of 80 kg, find the force a passenger experiences when the car is moving at 20kph and the passenger has a mass of 90kg.

Im not asking for the answers, i just dont know how to solve the problems. The formulas, steps, or functions are what I am looking for.