What is 9 and 8/15 plus 11 and 5/12?

In the pendulum formula t=2pi. read the problem on the picture ! ; $; $; ! ; ! ; ! ; )$; ! ; ! ; ! ; $; $; $! ; ! ; ); $; $$

What is the order of magnitude for the number of liters in a large bottle of soda served at a party

How much orange juice do you need to make 2 servings of lemony orange slush?