The projected world population for the year 2025 is 8,000,000,000 people. How do you write this number in scientific form?

1 Answer
Jul 3, 2016

Answer:

# 8 xx 10^9 #

Explanation:

Scientific notation shows the size of a number as a power of 10.

#100 = 1 xx 10^2, 10 000 = 1 xx 10^4# and so on.

However, the number at the front must be less than 10 - only one (non-zero) digit is allowed before the decimal point.

#8,000,000,000 = 8 xx 1,000,000,000 " (8 billion)"#

=# 8 xx 10^9 " there are 9 place holders after the 8"#