For this individual, to accumulate $400,000 in a span of 6 years with continuous compounding at a rate of 13%, an approximate investment of 183362.4 dollars would be necessary.
How to get the amount
The formula we would use to solve this is given below:

in this formula
the principal is given as P while e is the exponential rate that the amount would have to increase.
Next we would try to expand the equation

From here we would have to get a formula for P. This would ve the subject of the equation
To do this, we are going to have to divide both sides by
:
P = $400,000 /

P = 183362.4 dollars (rounded to the nearest cent)
Consequently, to accumulate $400,000 in a span of 6 years with continuous compounding at a rate of 13%, an approximate investment of 183362.4 dollars would be necessary.