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.

f(t) = 50 + 30t

Step-by-step explanation:

Let, Jabari's total fee = f (in dollars) and the time taken per hour = t

Let, the initial fee charged = x dollars.

It is given that, $30 is charged per hour for his work.

As, the total fee charged for 4 hour job is 170.

We get the equation,

Initial fee + 30 × 4 = 170

i.e. x + 120 = 170

i.e. x= 170 - 120

i.e. x = 50

Thus, the initial fee is $50

So, Jabari's total fee is given by,

f(t) = Initial fee + 30 × Fee per hour

i.e. f(t) = 50 + 30t

Hence, the function formula for the given situation is f(t) = 50 + 30t.

c

step-by-step explanation: