A box contains 28 pink ribbons and 12 green ribbons. You randomly take a ribbon from the box. What is the probability of you picking a pink ribbon?

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?