Question

A single tree produces about 2.6 × 10² lb of oxygen each year. The Amazon rainforest has about 3.9 X 10^11 trees.
About how many pounds of oxygen are produced in the rainforest each day ?

Enter your answer in the blank
2.8 × 10 ^blank lb

Please remember these are scientific notations no exponents.

Answer 1

$(2.6\times10^2) \times (3.9\times10^{11}) = 1.014\times10^{14}$

$1.014\times10^{14}$ <---How much is produced by all the trees in a year. 
They want how much each day so divide by 365


$\frac{1.014\times10^{14}}{365} = 2.77808\times10^{11}$
$2.77808\times10^{11}$ <---answer per day