Test: SAT Mathematics

1.

Upon discovering a tree virus in British Columbia, scientists created a model to predict the tree population in a certain forest: , where  represents he number of trees after  months since the virus's discovery, and  represents the original number of trees that existed in the forest when the scientists made the discovery. Assuming that the model is correct, which of the following best describes the impact of the virus on the forest?

The number of trees in the forest is decreasing by 27% each month.

The number of trees in the forest is decreasing by 27 each month.

The number of trees in the forest is decreasing by 73% each month.

The number of trees in the forest is decreasing by 73 each month.

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