What is the answer to this question question

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

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