Answer:
Do you like having a pet? - statistcal question
Step-by-step explanation:
^^^^
Using an exponential function, it is found that Mary's initial investment was of $3,030.
<h3>What is an exponential function?</h3>
An exponential function is modeled by:
.
In which:
Her investment model, in thousands of dollars, is:

Then a = 3.03, since we measure the amount in thousands of dollars, Mary's initial investment was of $3,030.
More can be learned about exponential functions at brainly.com/question/25537936
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Answer:
n = m − a
Step-by-step explanation:
Given:
a = m - n
Where,
a = Actual cost an item
m = Original price
n = amount of coupon
Solve the formula for the amount of the coupon
a = m - n
Add n to both sides
a + n = m - n + n
a + n = m
Subtract a from both sides
a + n - a = m - a
n = m - a
Amount of coupon, n = Original price of an item, m - Actual cost of an item, a