Ineed 2.48 -unit price rounded to the nearest thousandth

And employee salary increased by $4500 which represents a 15% raise what is the rate of the increase

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.

Math it's appreciated. (picture provided)