Danny wants to promote his new business. He gave out a free pen to every fourth customer and a free pad of paper to every ninth customer. Which customer will be the first to receive both a pen and pad of paper?

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!