Joan mixed 9 mL of an acidic solution with 8 mL of a 46% acidic solution to make a 47% acidic solution. Find the percent acid concentration of the first solution

Astore has clearance items that have been marked down by 60%. they are having a sale, advertising an additional 55% off clearance items. what percent of the original price do you end up paying?

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

The expression 1.01*1.005(^t) gives the amount of money, in thousands of dollars, in carter's savings account (t) years after he opens it. what does 1.01 represent in this expression?