750=1000(1+i)^-4 solve for i, how?
750=1000(1+i)^-4 divide both sides by 1,000
0.75 = 1/ [1 + i]^4 cross multiply
0.75[1 + i]^4 = 1 divide both sides by 0.75
[1 + i]^4 = 11/3 take the 4th root of both sides
1 + i = 1.07457....
i =1.07457 - 1
i =0.07457 x 100
i = 7.457%
