Which algebraic expression is a polynomial?

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41

The ideal weight of a nickel is 0.176 ounce. to check that there are 40 nickels in a roll, a bank weighs the roll and allows for an error of 0.015 ounce in total weight