Josh examines the expression 5^-x over 5^x, where m is greater than 0. he claims that the expression has a value equal to 1 because it simplifies to 5^0, and any integer to the 0 power is 1. is josh correct? explain why or why not.

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!