Question

A lake in California contains about 8,500,000,000,000 gallons of water. How can this number be written in scientific notation?

Answer 1

8.5x10^12

Just count how many times needed to move the decimal place to make 8.5 then multiply by 10 ^ (number of places you needed to move)

Answer 2

Scientific notation is in the form of 1~10*10^x, so the scientific notation would be 8.5*10^12