Matheus

At stp 10 liters of N2 contains the same total number of molecules as how many liters of He.

Pat has 6 red, 1 yellow, 3 green, and 2 blue balloons. If she picks 1 balloon at random, what is the probability that the balloon will be green?

thanks

Maya goes to the mall to buy some shoes. The shoes that she wants usually cost $42, but they were on sale for 40% less. There is a 5% sales tax, and Maya pays for the shoes with a $50 bill. how much change does Maya resive.