Question

At the end of the 20th century, the world population was approximately 6.1 × 10 raised to the power 9 people. Express this population in the usual form. How would you say this number in words?

Answer 1

The world population at the end of the 20th century, approximately 6.1 × 10^9 in scientific notation, translates to six billion one hundred million people in usual form.

Step-by-step explanation:

The world population at the end of the 20th century was approximately 6.1 × 109 people. To express this number in the usual form, we convert it from scientific notation to a standard numeral. The conversion is done by 'moving' the decimal point to the right 9 places (as indicated by the exponent 9 in the scientific notation), which gives us 6,100,000,000. Therefore, the world population at that time was approximately six billion one hundred million people.

In standard words, we would pronounce this number as 'six billion one hundred million' people.