6r 2- 4r - 16
grouping method

Which of the following of the following sets of side lengths could not form a triangle?

Use the radius you found in part i (r=26.8 cm) with the surface area formula below to find the surface area of the sphere. show your work and round your answer to the nearest tenth. the surface area of a sphere: sa = 4πr^2 self note: 3.8.4

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.