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.
To determine which number has the least value, we need to convert all numbers into scientific notation.
98,789,000 = 9.8789 x 10^7
987,890,000 = 9.8789 x 10^8
89,987,000 = 8.9987 x 10^7
Comparing the exponents, we can see that 9.8789 x 10^7 has the least value. Therefore, the number 98,789,000 has the least value in scientific notation.