Since we couldn't find any red paint, we painted the doghouse green. When we were done, everybody seemed to think green was a good color for the doghouse. Even Pierre, our poodle, ran around the doghouse barking enthusiastically. Even though we had the money to buy some red paint, I'm glad we didn't. QuestionWhy was the doghouse painted green?

The doghouse was painted green because they couldn't find any red paint.

Explanation:

According to the passage, the narrator and others were not able to find red paint for the doghouse. That is the reason why they used the green paint they already had. Though they did have money to buy red paint, using the green one seemed to make everyone happy, including the poodle, Pierre. So, simply put, the doghouse was painted green because there was no red paint to be used.

the boy's acceleration toward the girl is 2.08 m/s^2.

explanation:

according the newton's third law, the force causing the girl accelerate towards the boy will be me with equal counter-force causing the boy to accelerate towards the girl. these forces will be of equal magnitude and allows us to determine the boy's acceleration:

the boy's acceleration toward the girl is 2.08 m/s^2.