Please... I really need help

Astudent received the following grades last semester. find the student's semester grade point average. an a is algebra (3 credits), a b in history ( 3 credits), a in sociology ( 3 credits) a d in english ( 3credits) and a c in seminar ( 2credits). an a is worth 4 points, a b is worth 3 points a c is worth 2 points and a d is worth 1 point.

Determine the volume of a cylinder bucket if the diameter is 8.5 in. and the height is 11.5 in.

Solve the equation - 2(m -30) = -6m a-15 b-13 c-8 d8