Help me please. hurry :((

answer the 2 questions.

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?

In triangle opq right angled at p op=7cm,oq-pq=1 determine the values of sinq and cosq

To decrease an amount by 16% what single multiplier would you use