SOLUTION: How can I solve this problem if I do not have a value for r? In all the examples I see, there is always a value given for r. 5(1+(r/360)^720 = 12

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: How can I solve this problem if I do not have a value for r? In all the examples I see, there is always a value given for r. 5(1+(r/360)^720 = 12      Log On


   

Question 149307This question is from textbook College Algebra
: How can I solve this problem if I do not have a value for r? In all the examples I see, there is always a value given for r.
5(1+(r/360)^720 = 12 This question is from textbook College Algebra

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Is your equation 5%281%2B%28r%2F360%29%5E720%29=+12??? You're missing a parenthesis.


5%281%2B%28r%2F360%29%5E720%29=+12 Start with the given equation.


1%2B%28r%2F360%29%5E720=+12%2F5 Divide both sides by 5.


%28r%2F360%29%5E720=+12%2F5-1 Subtract 1 from both sides.


%28r%2F360%29%5E720=+7%2F5 Combine like terms.


r%2F360=+1.000467 Take the 720th root of both sides.


r=360.16812 Multiply both sides by 360.