Estimated Show that there are 1.4*10^8 pet fish and 9.4*10^6 pet reptiles in the United States
How many fish and reptile pets are in the United States altogether?
I don't know if you know how scientific notation works so here's a quick refresher!
Scientific notation just makes expressing large numbers easier by using 10s! Here's an example:
13,000,000 (13 million) can be expressed as 1.3 x 10^7!
So when you are converting scientific notation back to a number, just move the decimal point to after the number to make it no longer a decimal then use the rest of the 0s at the end!
1.4 x 10^8 ----> 140000000
9.4 x 10^6 ----> 9400000
140000000 * 9400000 = 1316000000000000 or 1.316 x 10^15