... = 25 49 . This is approximately 1 /2, which is less than 2/ 3 A: D. (0.9) 2 × (0.9) 2 = (0.81) ×(0.81). This is approximately 0.65, which is less than 2/ 3. Then, 27 ... rate then is 1/J. Joseph and Lindsay’s combined rate is 3 /2 + 1/J, which can be simplified: 1 /2 + 1/J J / 2J + 2 / 2J (J + 2) / 2J If the two of them finish the room in one hour, using the ... ((J + 2) / 2J )(1) = 1 J + 2 = 2J J = 2 That means that Joseph’s rate is 1 /2, the same as Lindsay’s. The question though asks us what fraction of the room Joseph would complete in 20 minutes,...