what was the interest rate on an account that took 18 years to double if the interest rate was compounded continuously and no deposits or withdrawals were made during the 18 year period?

ian gone lie this got me confused

step-by-step explanation:

the answer is 2/54

step-by-step explanation:

b. hoped i'm right lol

step-by-step explanation:

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.