In a recreation park a childrens slide is 27 feet long and makes an angle of 39 degrees with the ground. its top is reached by a ladder 18 feet long. what is the angle of inclination of the ladder?

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