Eric and his work crew have 50 trees to plant. in 8 hours today, they planted 40 trees. if they work at the same rate tomorrow, how long will it take to finish planting the trees? 2 hours

2 hours

Explanation:

1) Determine how many trees they will have to plant tomorrow.

That is: 50 - 40 = 10 trees.

2) Determine the rate of planting:

40 trees / 8 hours

3) Set the ratio for the 10 trees:

10 trees / x

4) Set the proportion:

10 trees / x = 40 trees / 8 hours

5) Solve for x:

x = 10 tress * 8 hours / 40 trees =  2 hours