what is the volume of a cylinder that has a radius of 6 cm and a height of 28 cm? V = pr²h Plug in 6 for r and 28 for h V = p(6)²(28) Do that with a calculator. It comes out 3166.725395 cm³ You should round that off however your teacher told you to. Here are all the possible roundings off: 3166.725395 cm³ 3166.72540 cm³ 3166.7254 cm³ 3166.725 cm³ 3166.73 cm³ 3166.7 cm³ 3167 cm³ 3170 cm³ 3200 cm³ 3000 cm³ Pick the one you think your teacher would like best. Edwin