Asign says that the price marked on all music equipment is 35% off the original price. you want to buy an electric guitar for the $315. write an equation to represent the total cost c for the price p with a 35% discount

The equation m = 19.32v can be used to find the mass m in grams of a pure gold coin with volume v in cubic centimeters. carl has a coin with a mass of 37.8 grams. the coun's volume is 2.1 cubic centimeters. could the coin be pure gold? explain your reasoning. whoever answers this correctly gets marked brainliest! this is also worth a decent amount of points than normal questions!