In one class, homework is worth 50% of the final grade, each of 3 projects is worth 10%, and a final exam is worth 20%.
(a) If a student has an 88 homework average and a 94 on the first project, what is the student's grade at this point?
(b) If the same student from part (a) gets a 76 on the second project and a 74 on the third project, what is the lowest grade the student can get on the final exam to get an 80 overall in the course?
( for the first anwer it k