Withdrawing $10 every week from an outstanding balance of $400
2 answers:
Answer:
.
Step-by-step explanation:
Let w represent the number of weeks.
We are supposed to write an expression for the given word phrase.
Since the with-drawl amount is $10 per week, so amount withdrawn in w weeks would be .
The amount left after w weeks would be $400 minus .
Therefore, our required expression would be .
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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.
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.