Hiroshi paid $34.95 to rent a car for a day, plus 12¢ for each kilometre he drove. The total rental cost, before taxes, was $55.11. How far did Hiroshi drive that day?

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