if the volume of the cylinder is represented by 5x^2+ 15x+2 and the height is 5x, which expression represents the area of the base

On the first of each month, shelly runs a 5k race. she keeps track of her times to track her progress. her time in minutes is recorded in the table: jan 40.55 july 35.38 feb 41.51 aug 37.48 mar 42.01 sept 40.87 apr 38.76 oct 48.32 may 36.32 nov 41.59 june 34.28 dec 42.71 determine the difference between the mean of the data, including the outlier and excluding the outlier. round to the hundredths place. 39.98 39.22 0.76 1.21

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

What is the simplified form of square root of 400 to the 100th power ?