Help..? Pleaseee , it has to do with the Pythagorean Theorem. But I have no idea how to do it

If 1 km = 0.621 miles, how many miles are in a centimeter

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

Select the correct answer from each drop-down menu. consider the following polynomials equations. 3x^2(x-1) and -3x^3+ 4x^2-2x+1 perform each operation and determine if the result is a polynomial. is the result of a + b a polynomial? yes or no is the result of a - b a polynomial? yes or no is the result of a · b a polynomial? yes or no