What is the x value when F(x)=12?

What is the exact volume of the cylinder (radius 13 in., height 30 in.)

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.

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?