Question

Dayton Lake was originally blue because it only had 40 algae plants. Then towns and farms cropped up by the lake. This caused 615 more algae plants to grow, which turned the lake green. How many algae plants are now in Dayton Lake?

Answer 1

655

Explanation:

To get this answer, you would start with the original number of algae plants (40) and add the additional 615 algae plants that grew due to human activity:

40 + 615 = 655