Answer:
a) [tex]10^{7}[/tex]
c) [tex]10^{-5}[/tex]
b) [tex]10^{-1}[/tex]
d) [tex]10^{12}[/tex]
Step-by-step explanation:
When denoting a number in scientific notation there must only be one integer and the rest of the digits must be after the decimal separator. Having this in mind you only need to count the amount of places the decimal separator has to move to restore the number to the original form. It it has to move to the right, the exponent is positive otherwise is negative:
a) [tex]84,961,306 = 8.4961306*10^{7}[/tex]
c) [tex]0.000033812 = 3.3812*10^{-5}[/tex]
b) [tex]0.4870 = 4.87*10^{-1}[/tex]
d) [tex]3,890,406,000,000 = 3.890406*10^{12}[/tex]