Arectangle's length and width are in a ratio of 9: 2. the perimeter is 66 inches. what are the length and width?

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?

If 20% of a number is 35, what is 50% of that number?

According to the data set, where should the upper quartile line of the box plot be placed?