The surface area of a cylinder is given by the formula SA = 2r2 + 2rh.

A cylinder has a radius of 15 cm and a surface area of 1,620 cm2 .

Find the height of the cylinder

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

Adrawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. what is the least number of socks you must choose, without looking, to be certain that you have chosen two socks of the same colour?

A50% increase followed by 33 1/2% decrease