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CesarCarvajal969
22.10.2019 •
Mathematics
131. a patient in a hospital needs to maintain a certain amount of a medication in her bloodstream to fight an infection. suppose the initial dosage is 10 mg, and the patient is given an additional maintenance dose of 4 mg every hour. assume that the amount of medication in the bloodstream is reduced by 25% every hour.
a. write a function for the amount of the initial dosage that remains in the bloodstream after n hours.
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Ответ:
Y=3n+10
Step-by-step explanation:
Hello,
The first thing we should know is that this exercise is modeled by equating a straight line, which is Y = mx + b
where Y, is the value in milligrams of the patient's dose, b is the intercept with the Y axis and x is the number of hours that pass, and m is the slope, taking into account the above we infer the following equation
Y=mn+b
Now what we do is find every 2 points of the line using the problem data, in order to find the complete equation and the slope,
N1=0 Y1=10mg
N2=1 Y2=10mg+4mg=14mg
b is the value of Y when n = 0 therefore b = 10
Now we remember the equation of the slope
the ecuation is
Y=4n+10
Finally, the problem explains that the body loses 25% of the medication, therefore we multiply the equation by the 75% that remains in the body taking into account that the initial dose for N = 0 must be 10mg.
final ecuation
Y=3n+10
Ответ:
27
Step-by-step explanation:
3x + 9 = 90 degrees
Take away 9 from both sides to get xs on one side and numbers on the other
3x = 81
Divide by 3 to get x alone
x = 27