Need help on my homework questions

Consider the following function. which of the following graphs corresponds to the given function? w. x. y. z. a. z b. y c. x d.

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters

What is the solution of the equation? 35√(x+2)3+3=27