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Alisiya [41]
3 years ago
13

The test to detect the presence of a liver disorder is 98% accurate for a person who has the disease and 97% accurate for a pers

on who does not have the disease. In a given population, 3.5% of the people actually have the disorder. The probability that a randomly chosen person tests negative is
Mathematics
1 answer:
tester [92]3 years ago
7 0
The probability tests to detect a liver disorder:
P (presence)= 0.98 (true)  0.02 (false)
P (absence)= 0.97 (true)  0.03 (false)

P(have disorder from the population)=0.035
P(do not have disorder from the population)= 0.965

To test positive:
P[have disorder and true from P(presence)] + P[do not have disorder and false from P(absence)]

=0.035*0.98+0.965*0.03= 0.06325

The answer is<span> 0.06325 </span>
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What is the zero in the quadratic function f(x)= 9x^2-54x-19?
Alex17521 [72]

Answer:

6.33... and 0.333...

Step-by-step explanation:

The quadratic formula is


x=\frac{-b+\sqrt{b^2-4ac} }{2a}.


It is important because while some quadratics are factorable and can be solved not all are. The formula will solve all quadratic equations and can also give both real and imaginary solutions.  Using the formula will require less work than finding the factors if factorable. We will substitute a=9, b=-54 and c=-19.

x=\frac{-b+/-\sqrt{b^2-4ac} }{2a}\\x=\frac{-(-54)+/-\sqrt{(-54)^2-4(9)(-19)} }{2(9)}\\x=\frac{54+/-\sqrt{2916+684} }{18}

We will now solve for the plus and the minus.

The plus,,,

x=\frac{54+\sqrt{3600}}{18}\\x=\frac{54+60}{18}\\x=\frac{114}{18}\\x=6.3

and the minus...

x=\frac{54-\sqrt{3600}}{18}\\x=\frac{54-60}{18}\\x=\frac{-6}{18}\\x=-0.333...

8 0
3 years ago
No fakes please!<br> Ill give brainliest!!!
Andreas93 [3]

Step-by-step explanation:

1. 5/8 = 62.5%

2. 1/5 = 20%

3. 4 2/3 = 4.66%

8 0
2 years ago
5400÷90=540 tens÷9 tens
solniwko [45]
Hmmm, I'm guessing your asking if that's correct, if so, yes
8 0
3 years ago
WILL MARK BRAINLY! The population of a particular city is given by the function P(t) = 82,100(1.02), where t is the time in year
Tcecarenko [31]

Answer:

P(t) = 82,100(1.02)^t

 1.t is the time in years  

 

2.P(t) is the population after t years

 

3. 100%=1       102-100=2% so the interest rate is 2 %

   102%=1.02

 

4. after 15 year just put in term s of 't' (wich is represent the years) 15 :

Step-by-step explanation:

3 0
2 years ago
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