What is an equivalent expression to ( 14400^4 )^8

Which of the following situations represents a linear relationship? a. theresa increases the distance she runs by 0.1 miles every week. b. the volume of a box depends on the length of box. c. the amount of money in a bank account increases by 1 percent each year. d. the population of a town doubles every 5 years.

What are the solutions to the equation 4x2+3x=24-x

Ineed in figuring out this problem.