How much water should be evaporated from 300 grams of a 20% salt solution to get a 25% salt solution?

If you shift the linear parent function, f(x)=x, up 13 units, what is the equation of the new function?

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *