8. The exponential function f takes the value 10 when x = 1 and 30 when x = 2. a. What is the y-intercept of f? Explain how you know.
b. What is an equation defining f?

Answer these questions showing your work plz

Jabari is power washing houses for a summer job. for every job, he charges an initial fee plus $30 for each hour of work. his total fee for a 4 -hour job, for instance, is $170 . jabari's total fee, f, for a single job is a function of the number, t, of hours it takes him to complete the job. write the function's formula.

The measure of an angle is 117°. what is the measure of a supplementary angle?