Price of flash drive:-$18.50
sale price:-81%
so, price reduced :-81/100×18.50:-14.985
actual price:- $18.50+$14.985:-$33.485
The surface area of a solid is just the total area of all its faces. We know a cube has 6 identical faces with area s^2 where s is the side length.
So 6s^2 is the surface area. We can use this to find s.
6s^2 = 600
s^2 = 100
s = 10 cm
Principal = $15000
Amount = $16099.44
Rat of interest = r
Time = 2 years
Then
A = P(1 + r)^t
16099.44 = 15000 (1 + r)^2
(1 + r)^2 = 1.073
(1 + r)^2 = (1.036)^2
Then
1 + r = 1.036
r = 1.036 - 1
= 0.036
= 0.036/100
= 3.6%
From the above deduction, it can be easily concluded that the correct option among all the options that are given in the question is the second option.