The diameter of the base of a right circular cylinder is 12 inches, and the height is 29 inches. What is the surface area of the cylinder?

25/14 or 1.

step-by-step explanation:

the dots mean that it has infinitely more numbers behind it

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.

you can use a^2+ b^2=c^2