John and Marquis met for dinner in downtown Boston. John did flat-rate valet parking for $20. Marquis went to another valet and paid $8 up front and $3 for every hour, including the first hour. Ultimately, they ended up paying the same amount. How much did each one pay? How long did they stay?

Solve the problem. a student earned grades of c, a, b, and a in four different courses. those courses had these corresponding numbers of credit hours: 4, 5, 1, and 5. the grading system assigns quality points to letter grades as follows: a = 4, b = 3, c = 2, d = 1, and f = 0. compute the grade point average (gpa) and round the result to two decimal places. 3.40 3.50 8.75 2.18