4. Two positive integers between 51 and 999 are both rounded to the nearest hundred. If these two numbers are multiplied together, which of the following must be true?

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?

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

The box plots show the average speeds, in miles per hour, for the race cars in two different races. which correctly describes the consistency of the speeds of the cars in the two races?