Write 840,000,000,000 in scientific notation.  Select the correct option: A) 8.4 * 10^11 B) 800.900 * 10^11 C) 8.900 * 10^11 D) 80.9000* 10^11 E) 08.900 * 10^11
a * 10 n , where a is a real number such that 1 * |a| &lt; 10 and n is an integer.   840,000,000,000 = 8.4* 100,000,000,000 = 8.4 * 10 11**   correct answer 8.4 * 10^11
<result>A</result>
Write 840,000,000,000 in scientific notation.