Susan had four boxes of cereal in her pantry. If she went through 7/2 boxes in a month, how many boxes of cereal remain?

Answer this 30 points and brainliest!

[tex]5 \times1 \frac{12}{13} [/tex] me

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