Check the picture below.
neverminding for a few seconds the volume of the cylinder, the percentage in the height used by the water will be the same as the percentage of its volume. We know the total amount or 100% of the height is 14, so what is 11 in percentage?
![\begin{array}{ccll} amount&\%\\ \cline{1-2} 14&100\\ 11&x \end{array}\implies \cfrac{14}{11}=\cfrac{100}{x}\implies 14x=1100 \\\\\\ x = \cfrac{1100}{14}\implies x = \cfrac{550}{7}\implies \boxed{x \approx 78.6}](https://tex.z-dn.net/?f=%5Cbegin%7Barray%7D%7Bccll%7D%20amount%26%5C%25%5C%5C%20%5Ccline%7B1-2%7D%2014%26100%5C%5C%2011%26x%20%5Cend%7Barray%7D%5Cimplies%20%5Ccfrac%7B14%7D%7B11%7D%3D%5Ccfrac%7B100%7D%7Bx%7D%5Cimplies%2014x%3D1100%20%5C%5C%5C%5C%5C%5C%20x%20%3D%20%5Ccfrac%7B1100%7D%7B14%7D%5Cimplies%20x%20%3D%20%5Ccfrac%7B550%7D%7B7%7D%5Cimplies%20%5Cboxed%7Bx%20%5Capprox%2078.6%7D)
-7 and 5. The product would be -35 and the sum -2.
Hope this helps
I think 20% srry just woke up
20000*0.45 = 9000 in the bond
20000*0.15 = 3000 in the CD
20000*0.20 = 4000 in stocks
20000*0.029 = 580 in savings
A=9000(1 + 4.35%)^3 = 10,226.33
A=3000(1 + 2.90%)^3 = 3,268.64
A=4000 (1 + 8%) x (1 - 4%) x (1 + 6%) = 4,396.03
A=580(1 + 4.35%)^3 = 4,545.04
Total value = 22,436.04
Gain = 22,436.04 - 20,000 = 2,436.04