T costs Charlie's Car Repair Shop $27 to change the oil The shop charges their
customers $40 for an oil change. What is
the percent of markup in the cost of an
oil change?

Is it increase or decrease.

Carmen and matt are conducting different chemistry experiments in school. in both experiments, each student starts with an initial amount of water in a flask. they combine two chemicals which react to produce more water. carmen's experiment starts with 30 milliliters of water in a flask, and the water increases in volume by 8.5 milliliters per second. matt's experiment starts with 10 milliliters of water and increases in volume by 28% each second.