Whole number greater than 99,999,999 and less than 100,000,100

The ratio of blue cards to green cards is 2 to 5. there are 8 blue cards. complete the diagram and explain how you can find the number of green cards.

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?

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)