Here's the problem:
it is almost the end of the grading period. i have 730 out of 880 points so far in my math class which means i currently have a b (83%). there are 90 points remaining before grades come out. my teacher rounds each student's score to the nearest percent. what is the fewest number of points i need to get and end up with a grade of
c (at least 70%
b (at least 80%
a (at least 90%
explain.