Answer:
$4960.
Step-by-step explanation:
We have been given that Mary’s investment account can be modeled by the function, in thousands of dollars. We are asked to find Mary's initial investment.
We can see that the given function is an exponential function where, initial value is 4.96 and growth factor is 2.18.
Since the function given Mary's investment in thousands of dollars, so we need to multiply 4.96 by $1000.
Therefore, Mary's initial investment was $4960.