Hurry i’ll mark you if you’re correct

Is this a polynomial function? i need to know asap

Describe how you can act financially responsible.

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