Question

chau is deciding how many trees to plant. here are his estimates of the time it will take.
fill in the blanks below.
with each additional tree, the estimated time (choose one) by □ minutes.

Explanation:

Step1: Find the difference in time

For \(1\) tree to \(2\) trees: \(30 - 20=10\) minutes.
For \(2\) trees to \(3\) trees: \(40 - 30 = 10\) minutes.
For \(3\) trees to \(4\) trees: \(50 - 40=10\) minutes.

Answer:

With each additional tree, the estimated time increases by \(10\) minutes.