One serving of peanut butter contains 190 calories. What percent of a 2000 calorie diet is contained in one serving of peanut butter? a. 38%
b. 90.5%
c. 9.5%
d. 10.5%

What is the greatest common factor of 8 and 36

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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?