If 60 mg of drug is in b 500 ml of solution, how many ml of solution contain 36 mg of drug

Find the area of a square with a side length of 1/4 in.

What is the standard form of -5x^2+2x^4-11+x^3+3x

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