A cross-section of an irrigation canal is a parabola. If the surface of the water is 34 ft wide and the canal is deep at the center, how deep is it 9 ft from the edge?

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