Question

Arrange the following numbers in descending order:

• A. $3.21\times {10}^9$
• B. $6.23$ Billion
• C. $9.25$ Million
• D. $9.25\times {10}^7$
• E. ${10}^{-7}$

Answer 1

$6.23$ Billion $=6.23\times {10}^9$
$9.25$ Million $=9.25\times {10}^6$
$\therefore 6.23\text{Billion}>3.21\times {10}^9>$
$9.25\times {10}^7>9.25\text{Million}>{10}^{-7}$