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3 years ago

An archaelogist in Turkey discovers a spear head that contains 27% of its original amount of C-14.

Mathematics

1 answer:

Ostrovityanka [42]3 years ago

4 0

The correct answer is 13093 without any decimal points or commas.
Hope I helped!

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A new test to detect TB has been designed. It is estimated that 88% of people taking this test have the disease. The test detect

Elodia [21]

Answer:

Correct option: (a) 0.1452

Step-by-step explanation:

The new test designed for detecting TB is being analysed.

Denote the events as follows:

D = a person has the disease

X = the test is positive.

The information provided is:

$P(D)=0.88\\P(X|D)=0.97\\P(X^{c}|D^{c})=0.99$

Compute the probability that a person does not have the disease as follows:

$P(D^{c})=1-P(D)=1-0.88=0.12$

The probability of a person not having the disease is 0.12.

Compute the probability that a randomly selected person is tested negative but does have the disease as follows:

$P(X^{c}\cap D)=P(X^{c}|D)P(D)\\=[1-P(X|D)]\times P(D)\\=[1-0.97]\times 0.88\\=0.03\times 0.88\\=0.0264$

Compute the probability that a randomly selected person is tested negative but does not have the disease as follows:

$P(X^{c}\cap D^{c})=P(X^{c}|D^{c})P(D^{c})\\=[1-P(X|D)]\times{1- P(D)]\\=0.99\times 0.12\\=0.1188$

Compute the probability that a randomly selected person is tested negative as follows:

$P(X^{c})=P(X^{c}\cap D)+P(X^{c}\cap D^{c})$

$=0.0264+0.1188\\=0.1452$

Thus, the probability of the test indicating that the person does not have the disease is 0.1452.

4 0

2 years ago

Which segment is a dilation of BC using A as the center of dilation and a scale factor of 2/3

BabaBlast [244]

Answer: 45

Step-by-step explanation:

5 0

2 years ago

Solve the following equation for H. Be sure to take into account whether a letter is

MrMuchimi

Answer:

$H=n-8$

Step-by-step explanation:

$8+H=n$

$\mathrm{Subtract\:}8\mathrm{\:from\:both\:sides}$

$8+H-8=n-8$

$Simplify$

$H=n-8$

7 0

2 years ago

PLS HELP ME ASAP WITH 1, 2, 5, 6, 11, and 12 PLS!!

melamori03 [73]

1-

number 2) is correct

2- 3) is true

11) Jacob is not correct. because 6radical 5 is irrational

12) radical 20 is an irrational number but

so a+b is irrational

but
$\sqrt{225} = 15 \\ it \: is \: rational$

so b+c is rational

good luck

8 0

3 years ago

Someone help pleaseee

gregori [183]

Answer:

the answer is 1/2 which loos like "D"

Step-by-step explanation:

the top ends up being x ^-8 and the denominator is x^-7

which is x^&/x^8 = 1/x = 1/2

4 0

2 years ago