A circle has a radius of 6.87 feet. What is the circumference of this circle? Use 3.14 for pi. Round your final answer to the ne
2 answers:
Answer:
The circumference of this circle is feet.
Step-by-step explanation:
Circumference of a circle =
Where,
r is the radius of the circle.
Therefore, we can find the circumference of the circle by substituting the values to the equation:
The circumference of this circle is feet. (Rounded to the nearest tenth)
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The predictive value of a positive test is is 0.43.
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This question is solved using the concepts of sensitivity and specificity.
- Sensitivity: It is the true negative rate, that is, the proportion of people without the disease that test negative.
- Specificity: It is the true positive rate, that is, the proportion of people with the disease that test positive.
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- Sensitivity of 60% means that of the 100 - 10 = 90% of people without the disease, 60% test negative and 100 - 60 = 40% test positive.
- Specificity of 70% means that of the 10% with the disease, 70% test positive.
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The predictive value of a positive test is:
Probability of a positive test, which is 40% of 90% plus 70% of 10%, so:
The predictive value of a positive test is is 0.43.
A similar question is given at brainly.com/question/22373775