Answer: 0.8333
Step-by-step explanation:
The formula to start with is (DC +CE) * CE = (AB + BE) * BE
Replace the letters with the numbers and equations:
(1 + x+4) * x+4 = (11 + x+1) * x+1
(x+5) * (x+4) = (x+12) * (x+1)
x^2 + 9x +20 = x^2 +13x +12
x^2 = x*x = 2x
11x+20 = 15x+12
20 = 4x+12
8 = 4x
x = 8/4
x = 2
50-n is the answer although you could use a different variable.
There would be no money saved because they are both the same. 1.1% per month is the same as 13.2% per year since 1.1 multiplied to 12 (the number of months in a year) is 13.2. Therefore, no money could be saved either way. Hope this helps!
