David has just joined a new companyemployer offers a number of different insurance polides as one of its employee benefits. for example, his employer's insurance covers prescription drugs and immunizations. david will also be receiving insurance at no cost from his employer .

Which expression is not a polynomial?

What is the inverse of the function f(x)=19/x³ ?

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!