Answer:
4.53×10^9 years old.
Explanation:
Scientific notation is a mathematical term or expression that illustrates a method of representing actual numbers or figures that are often considered too substantial or too insignificant to be written appropriately using normal decimal representation. It can be depicted as "a x 10^n"
Hence, in this case, converting the age of the moon which is 4,530,000,000 years old to scientific notation is equal to 4.53×10^9 years old.
