Answer:
The model for the pollutant levels in the soil t years from the first measurement is:

Step-by-step explanation:
We have a first measurement of 65 parts per million (ppm) of pollutant.
We also know that the pollutant levels were growing exponentially at a rate of 4.5% a year.
We can model this as:

The value of Y0 is the first measurement, that correspond to t=0.

The ratio for the pollutant levels for two consecutive years is 1+0.045=1.045. This can be expressed as the division between Y(t+1) and Y(t), and gives us this equation:
Then, we have the model for the pollutant levels in the soil t years from the first measurement:

Answer: 4p = 36 ; 3p = J.
Peter has 9 model cars, while Jade has 27 model cars.
Step-by-step explanation:
Andre has 36 model cars, which is 4 times as many as Peter. Let P represent Peter: 4p = 36.
How many times does 4 go into 36? 9 times. Peter has 9 model cars.
Peter has 1/3 of Jade's model cars. Let J represent Jade. 3p = J. We know p is 9, so we can plug it into this equation. 3 x 9 = 27. Jade has 27 model cars.
Answer: Required expression is given by

Step-by-step explanation:
Since we have given that
Number of miles per week Elia is training for her first marathon = 10 miles
According to question, we have given that she wants to increase her mileage by 2 miles every week.
so, Equation becomes
10,12,14,16..........
Let the number of weeks be x
Since it forms an Arithmetic sequence,
As we know the formula for nth term :

So, our required expression will be

The answer to the question is
18n^2
Answer:
I believe its 95
Step-by-step explanation: