Question 883092
I'm assuming the problem <i>should</i> be:

<blockquote>
"Stephen <font color="red"><s><font color="black">also</font></s></font> invests $500 at 5%/a for 5 years but with compound interest that compounds weekly. What is the final value of her investment?"
</blockquote>


If so, then...


FV = PV*(1+r/n)^(n*t)


FV = 500*(1+0.05/52)^(52*5)


FV = 641.935597415173


FV = <font color="red">641.94</font>


The final value of her investment is <font color="red">$641.94</font>