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lyudmila [28]
3 years ago
5

The equation sinx = (sqrt2)/2 is an identity. True or False?

Mathematics
2 answers:
Aleks [24]3 years ago
8 0
It's only true for specific x values but not all x values. The final answer is FALSE.<span>
</span>
STatiana [176]3 years ago
8 0

Answer:

FALSE

Step-by-step explanation:


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A new screening test for West Nile Virus is developed for use in the general population. The sensitivity and specificity of the
morpeh [17]

The predictive value of a positive test is is 0.43.

------------------

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.

------------------

  • 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.

------------------

The predictive value of a positive test is:

Probability of a positive test, which is 40% of 90% plus 70% of 10%, so:

p = 0.4\times0.9 + 0.7\times0.1 = 0.43

The predictive value of a positive test is is 0.43.

A similar question is given at brainly.com/question/22373775

7 0
2 years ago
My salary is £28,860 per year. What is my hourly rate of pay if I work 37 hours a week
Nostrana [21]

Answer:

pay rate £7.80

Step-by-step explanation:

28860 divide by 37 = 780

780 divided by 100 = 7.80

4 0
2 years ago
What is the area of a sheet of binder paper? (Binder paper is 8 1/2 inches by 11 inches.)
11Alexandr11 [23.1K]
Area of a rectangle is the product of length times width.  Thus, here we need the product of 8 1/2 inches by 11 inches.

One way of doing this follows:            8.5
                                                         8.5
                                                       ----------         
                                                         93.5 square inches

Rounding up, this comes out to 94 square inches.

Alternatively:     17             187
                         ---- * 11 = ------- = 93.5 square inches; rounded, that's 94.
                           2                 2
3 0
3 years ago
What is the domain of f(x) = 3x?
Stolb23 [73]
Answer is C.
All real numbers

hope it helps
5 0
3 years ago
Read 2 more answers
Simplify (-5) + (-4) + (7).<br> 0-2<br> 06<br> O<br> 8<br> 16
stich3 [128]

Answer:

- 2

Step-by-step explanation:

The question is - 5 + - 4 + 7

You do addition first.

-4 + 7 = 3

So now we have - 5 + 3

-5 + 3 = - 2

5 0
3 years ago
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