Answer:
square foot per hour
Step-by-step explanation:
The total area covered = 34 square foot
Time taken = 12 hours
This implies that it takes 12 hours to cover 34 square foot.
Using proportionality,
12 hours ---------------------------------------> 34 square foot
Dividing both sides by 12
---------------------------> 
1 hour ---------------------------------------> square foot per hour
The unit rate in square feet per hour is square foot per hour
The compounded interest function that models the situation is:
where
is the final amount of money after
years.
is the initial investment.
is the interest rate in decimal form.
is the number of times the interest is compounded per year.
is the time in years.
We know for our problem that
and
. To convert the interest rate to decimal form, we are going to divide the rate by 100%:
We also know that the interest is compounded anally, so it is compounded 1 time per year; therefore,
.
Lets replace the values in our formula to find the final amount after 8 years:
We can conclude that since we are dealing with compound interest we must use the function
. Also, after 8 years the balance in the account will be $1291.58
there are no inflection points, because it never changes concavity, is just a constant and thus for any region over the x-axis, will always be a positive value, and thus is always "concave up".
