Explain how to write a large number using scientific notation.

Step 1: Move the decimal point to the left until you have a number greater than or equal to 1 and less than 10. Step 2: Count the number of decimal places you moved the decimal point to the left and use that number as the positive power of 10. Step 3: Multiply the decimal (in Step 1) by the power of 10 (in Step 2).

Explanation:

i think the answer is going to be arabian desert!

they use tree rings to figure out weather patters.