Answer:
A. 0
Step-by-step explanation:
Nothing can be equal to itself if you subtract 9 from it.
This problem can be solve by graphing (technology), as suggested.
The answer is posted as an attached image. We see that after about 14.75 years, the invading species will surpass the indigenous population.
If it needs to be solved mathematically and accurately, the math is a little more advanced, using the bisection method, or Newton's method.
However, we can also do that by trial and error, starting from 14.75. It is easier than you might think.
Post if you would like to have more information on one or the other methods.
Note: the scale of y has been shrunk by 1000, so each unit on the y-axis represents 1000 frogs.
First we find the unit rate which would be how many words in 1 minute...
294/7 = 294 ÷ = 42 wpm
Now we multiply by how many minutes to find the total...
42 wpm × 11 min = 462 words.