When calculating probability what value is does the numerator represent and what value does the
denominator represent?

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

If the scale factor between two circles is 2x/5y what is the ratio of their areas?

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?