Question 561935
solve 60 = [400/(1+r)^3 for r?
:
multiply both sides by (1+r)^3
60(1+r)^3 = 400
:
divide both sides by 60
(1+r)^3 = {{{400/60}}}
(1+r)^3 = 6.667
:
find the cube root of both sides
{{{1 + r = 6.667^(1/3)}}}
Using a calc
1 + r = 1.882
;
subtract 1 from both sides
r = 1.882 - 1
r = .882