Luke is 1 1/3 times as tall as steve. 3/8 of steve's height is 45 cm. find the difference in height between the two boys.

Find the volume of the solid bounded by the plane z=0 and the paraboloid z=1-x^2 –y^2

The bottom of a vase is a square. each side measury y+11 units. the square has a perimeter of 55 units what is the value of y?

Let f of x equals the integral from 1 to 3 times x of the natural logarithm of t squared. use your calculator to find f″(1).