Exotic species might endanger the natural ecosystem of the place where they would be introduced by changing the food chain, or over multiplying, or anything similar.
![4 \times 12 = 48](https://tex.z-dn.net/?f=4%20%5Ctimes%2012%20%3D%2048)
![3 \times 2 = 6 \\ 2 \times 1 = 2 \\ 6 + 2 = 8](https://tex.z-dn.net/?f=3%20%5Ctimes%202%20%3D%206%20%5C%5C%202%20%5Ctimes%201%20%3D%202%20%5C%5C%206%20%2B%202%20%3D%208)
![48 - 8 = 40](https://tex.z-dn.net/?f=48%20-%208%20%3D%2040)
it needs 40 feet for the carpet.
hope this helps
I think the correct graph would have light intensity on the x-axis (because light intensity is the independent variable) and a measure of photosynthetic rate (either O2 evolution or CO2 consumption) on the y-axis (because the rate of photosynthesis is the dependent variable)... hope this helps