A math equation using parenthesis & brackets what operation would be used to evaluate the expression

Me with this one question, and i'll upvote the brainliest answer

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

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.