She should invest $6491.73.
The equation we use to solve this is in the form

,
where A is the total amount in the account, p is the principal invested, r is the interest rate as a decimal, n is the number of times per year the interest is compounded, and t is the amount of time.
A in our problem is 14000.
p is unknown.
r is 6% = 6/100 = 0.06.
n is 2, since it is compounded semiannually.
t is 13.
Answer:
<h3>
<em>2√41 unit</em>s</h3>
Step-by-step explanation:
<h2>Explanation is in the attachment</h2>
<h3>Hope it is helpful to you ☺️</h3>
Half of 73 is 36.5 and I think the nearest half would be 37