Answer:
Expression 1 equals, 25.
To make the second expression 19, you add parenthesis
The distance in scientific notation would be 5.8* 10^7.
The diameter of a human hair in scientific notation would be 2.5* 10^-3
Columbus, Ohio: 8.23* 10^5
United States 3.19*10^8
319,000,000/823,000 = 387.606318
So, it's about 387 times larger
