Which of the following numbers has a prime factorization of 3 x 3 x 3?

9
12
21
27

1. what are the missing reasons in the proof 2. it's in the second picture and 3

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

What is the distance between point a and b