Answer:
if I remember correctly it would be a triangle.
If two numbers round to the same number it doesnt always mean they are equal, for example: 11 and 9 both round to ten but they are not the same number
according to the picture we have:
x.y=4.7
(7)x(7)y=49xy=(49)(4.7)=230.3
After 5 years, value doubles.
Hence after 5 years, value is 250 x 2 = 500
After another 5 years, value doubles.
500 x 2 = 1000
Ans: $1000