Asingle tree produces about 2.6 × 10² lb of oxygen each year. the amazon rainforest has about 3.9× trees.
about how many pounds of oxygen are produced in the rainforest each day ?
enter your answer in the box.
2.8 × 10
lb

Pls! does anybody know a shortcut for answering these types of questions in the future?

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths

Tommy buys a sweater that is on sale for 40% off the original price. the expression p -0.4p can be used to find the sale price of the sweater, where p is the original price of the sweater. if the original price of the sweater is 50, what is the sale price?