1 : Mike bought a couch for $875. 6% sales tax is added. How much will Mike need to pay total for the couch? 2 : Bill left an 18% tip on a $15.80 lunch bill. How much did he leave for the tip?

3 : A $22 video game is discounted by 25%. How much is the game after the discount?

4 : Sal is a car salesman. He sold $95,980 worth of cars last month. If he makes 3.5% commission, how much money will he take home?

Answer asap ill give ! ’ a sample of radioactive material decays over time. the number of grams, y , of the material remaining x days after the sample is discovered is given by the equation y = 10(0.5)^x. what does the number 10 represents in the equation? a. the half-life of the radioactive material, in days b. the amount of the sample, in grams, that decays each day c. the time, in days, it will take for the samples to decay completely d. the size of the sample, in grams, at the time the material was discovered