Answer
The company will have around $383$ employees after 10 years.
Work Step by Step
This involves exponential decay the number of employees is decreasing each year.
RECALL:
Exponential decay is represented by the formula
$y=C(1-r)^x$
where
C = initial/original amount
r = decay rate
x = number of time intervals
The given situation has:
C = 640
r = $5\%$ per year
x = 10 years
Substitute these values into the given formula above to have:
$y=640(1-5\%)^{10}
\\y=640(1-0.05)^{10}
\\y=640(0.95^{10})
\\y \approx 383$
