What is the area of the rectangle below? :3

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

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

Solve for x. −3/4(x+2)=6 enter your answer in the box