What type of polynomial is: sqrt 7x^4 - x^3

What is the prime factorization of 23 ?me with this question

Determine the solution for mc001-1.jpeg

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