What is the circumference of a circle with a diameter of 40

Which of the following points is collinear with (-2,1) and (0,3)

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.

Which of these tools or constructions is used to inscribe a hexagon inside a circle?