Using the f(x) and g(x) to answer the question

Will give brainliest what is the value of x? enter your answer in the box.

Suppose a pendulum is l meters long. the time, t,in seconds that it tales to swing back and forth once is given by t=2.01

Adesigner charges a one time fee of $200 plus $40 an hour for each project. write an expression to represent how much money the designer will make for a project