It takes Maria 10 hours to pick forty bushels of apples. Kayla can pick the same amount in 12 hours. How long will it take if they work together? Round your answer
to the nearest tenths place.

The total amount of different books is 16.

Take away 1 from each, representing the same book they all read.

7 - 1 = 6 , 6 - 1 = 5 , 5 - 1 = 4

Add the three together.

6 + 5 + 4 = 15

Add that one book everyone read.

15 + 1 = 16 different books.

Hope I helped you out.