I think I know jus need to make sure:)

Which events occurred during the space race? check all that apply. (a) nasa was established. (b) yuri gagarin orbited earth. (c) the soviet union launched salyut. (d) the united states launched skylab. (e) the united states launched explorer 1.

The standard deviation of a population is 3.2.what is the margin of error? enter your answer in the box.

Is our world actually shaped as a globe