Use scientific notation to determine which of these numbers has the least value: 98,789,000; 987,890,000; or 89,987,000. Write your answer in scientific notation, expressed to the exact decimal place.

Answer 1

To determine which of these numbers has the least value, we need to rewrite them in scientific notation.

98,789,000 can be written as 9.8789 × 10^7.
987,890,000 can be written as 9.8789 × 10^8.
89,987,000 can be written as 8.9987 × 10^7.

Comparing the exponents, we can see that 9.8789 × 10^7 is the smallest value.

Answer 2

Place the numbers in descending order.

2.3 × 10−10 ; 3.2 × 10−10 ; 2.3 × 10−12 ; 2.3 × 10−8