Is 5.963 greater than or less than 5.9

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.