Question

$850 at 10% per annum for 4 years

Answer 1

850$ = A

A + 10%A = 110%A = B
B + 10%B = 110%B = C
C + 10%C = 110%C = D
D + 10%D = 110%D = X

A = 850$
B = 935$
C = 1028,5$
D = 1131,35$
X = 1244,485$

OR

X = A*1,1*1,1*1,1*1,1
X = A*(1,1^4)
X = 850$*1,4641
X = 1244,485$