Ken, barbie and teresa were in a swimming race. ken finished in 2minutes and one sixth. barbie finished in 18over8, teresa finished in 22over10 minutes. who got 1st, 2nd, 3rd

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

Could someone with number 1 and 2