So to multiply standard form we multiply the 2 numbers and the 2 indices separately.
[tex]2.6*3.9=10.14[/tex]
[tex] x^{2} * x^{11} = x^{13} [/tex]
So we've got [tex]10.14*10^{13}[/tex]
However Standard form must be [tex]1 \leq x \leq 10[/tex] therefore we need to divide that by 10 but to get the same number we add one onto the power of 10.
So the answer is:
[tex]1.014*10^{14}[/tex] lbs of oxygen are produced in the rainforest each year.
