Answer:
David. Around Rs 78
Explanation:
The Formula for compound interest is
A = P [ 1 + (R/100) ] ^ n
where P is the principle amount invested
R is the rate of interest and n is the number of years of investment
A is the accumulated amount after the investment time period
For David,
Amount (A1) = 2000 [ 1+ 0.04 ] ^ 8 = 2737.138
For Stephanie,
Amount (A2) = 1800 [ 1 + 0.05 ] ^ 8 = 2659.419
From this calculation A1 > A2, so the investment of David is more worth
The worth value is A1 - A2 = 77.719 = 78