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2 years ago

The diameter of a circle is 34 kilometers. What is the circle's circumference?

Mathematics

1 answer:

Yuri [45]2 years ago

8 0

Answer:

907.46 mm2

Step-by-step explanation:

Formula:

Area of circle = (¶d^2)/4

Given:

d = 34 mm

3.14

Solution:

Area A = (3.14 x 34^2)/4

= 907.46 mm2

[RevyBreeze]

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Answer:

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Step-by-step explanation:

z/16=8

z=8*16

z=128

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3 years ago

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3 years ago

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3 years ago

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Svetllana [295]

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3 years ago

Read 2 more answers

A diagnostic test for a disease is such that it (correctly) detects the disease in 90% of the individuals who actually have the

mart [117]

Answer:

0.1552

Step-by-step explanation:

Hi!

Give a random person, lets call:

D = the person has the disease

¬D = the person doesnt have the disease

T = the test on this person is positive (detects the disease)

¬T = the test on this person is negative

We are give the conditional probabilities:

P(T | D) = 0.9

P(¬T | ¬D) = 0.9

P(D) = 0.02

From those we know that:

P(T | ¬D) = 0.1

P(¬T | D) = 0.1

We must find P(D | T). For that we use Bayes theorem:

$P(D|T) = \frac{ P(T|D)P(D)}{P(T|D)P(D) +P(T| \neg D)P(\neg D) }$

$P(D | T) = \frac{0.9*0.02}{0.9*0.02 + 0.1*0.98} = 0.1552$

6 0

3 years ago