A book is marked down by 28 percent from an original price of $19.50. What is the new price? PLZ HELP ASAP

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.

Find the midpoint m of z1=(8+5i) and z2=(12+3i)

Ineed to know the answer to this algebra question.