Find the equation of the tangents to the curve x=9t2+3 , y=6t3+3 that pass through the point 12 9

smaller slope:
larger slope:

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