Raul is a saver. he sets aside $200 per month during his career of 40 years to prepare for a comfortable
retirement. he does not like the idea of investing so he puts his money in a savings account which earns 2%
interest per year. what is the balance of his retirement account after 40 years?

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.

3x^3-2x^2+4x-3= -3

x^2+3x+3= 3

-3÷3= -1

the answer is b 11. hope you got it down bud.