What is degree of the polynomial 5x^2+7x^3-2x

Cody ran nine miles on his first day of training. the next day he ran 1/8 that distance. how far did he run the second day?

Which of the following is the sum of 3 1/6 + 6 3/8?

The diameter of the moon is about 3500 km. approximate the surface area of the moon using the formula for the surface area of a sphere, s = 4? r^2. write your answer in scientific notation.