Olivia and Brittany each made a bowl of punch. Brittany used 2 3/5 times as much lemonade as Olivia did. If Olivia used 2 cups of lemonade, how many cups of lemonade did Brittany use? Write your answer as a fraction or as a whole or mixed number.

--cups

Acertain volume of water contains 100000 hydrogen atoms and 50,000 oxygen atoms how many hydrogen atoms are in a volume of water containing 4 million oxygen atoms

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?

What is the value of x? assume that the line is tangent to the circle.