Asingle tree produces about 2.6 × 10² lb of oxygen each year. the amazon rain-forest has about 3.9×10^11 trees. about how many pounds of oxygen are produced in the rain-forest each day ? 2.8*10^?

One tree produces about 2.6*10^2 = 260 lb of oxygen in 1 year.
The amazon rain-forest has about 3.9 * 10^11 trees.  So each year, 3.9*10^11*260 = 10.14 * 10^13 lb of oxygen each year. One year is consisted of 365 days, so each day, (10.14*10^13)/365 = 2.77 lb of oxygen are produced each day.

Hope this Helps! :)

Answer choices