Question

A single tree produces about 2.6 × 10^2 lb of oxygen each year. The Amazon rainforest has about 3.9 × 10^11 trees. About

how many pounds of oxygen are produced in the rainforest each day ? 2.8 × 10^? lb

Answer 1

(2.6 * 10^2)/365 = 260/365
(260/365) * (3.9 * 10^11) = 2.778 * 10^12 (3.d.p.) or 2.8 * 10^12 (1.d.p.)

Answer 2

`a\ single\ tree \ \ \ \rightarrow\ \ \ about\ 2.6 \cdot10^2\ lb\ of\ oxygen\ each\ year\\\\the\ rainforest\ \ \ \rightarrow\ \ \ about\ 3.9 \cdot 10^(11)\cdot2.6 \cdot10^2\ lb\ each\ year\\\\3.9 \cdot 10^(11)\cdot2.6 \cdot10^2=10.14\cdot10^(13)\\\\\\10.14\cdot10^(13)\ \ \ \rightarrow\ \ \ each\ year\\\\ \frac{\big{10.14\cdot10^(13)}}{\big{365}} \approx0.028\cdot10^(13)=2.8\cdot10^(11)\ \ \ \rightarrow\ \ \ dailly\\\\Ans.\ About\ 2.8\cdot 10^(11)\ lb\ each\ day.`