Apatient is given a 50 mg dose of medicine. the medicine's effectiveness decreases every hour at a constant rate of
40%. what is the exponential decay function that models this scenario? how much medicine will be left in the
patient's system after 2 hours?
f(x) = 50(0.40): 8 mg
f(x) = 50(0.60)*; 18 mg
fx) = 50(40)*: 80,000 mg
f(x) = 50(60)*; 180,000 mg

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm