You get it by cross multiplication
10×9÷3=30 and if you want to check
30 over 9 =3.333
10 over 3 = 3.333
Exponential decay is given by the equation
F = P(1 - r)^t
0.5 = 1(1 - 0.092)^t
0.5 = (0.908)^t
log 0.5 = log (0.908)^t
log 0.5 = t * log 0.908
t = (log 0.5)/(log 0.908)
t = 7.18
Answer: 7.2 years
1) 30% - 212.52/(427.25+212.52+75)
2) 893.59
Total amount spent on Flooring (427.25+212.52+75) = 714.87
Amount spent on furniture = 714.87 * 1.25= 893.59
3) 13%
(893.59-558.49-893.59/4)/893.59
