In the Valley School District, the final grades are rounded to the nearest 1
10
before they are reported.
If Jason's report card grade for his math class is an 87.5, his actual math grade falls within what range of numbers?

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of