Which of the following functions are an example of exponential decay?
1. f(x) = }(2)
11. f(x) = 3(1)"
III. f(x) = 2(4")
O A. I and II only
OB. I and III only
OC. Il only
OD. II and III only

answer: i'm great at algebra

~coco

step-by-step explanation:

correct answer is b. 27/8

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.