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omeli [17]
3 years ago
12

Find the radius of a circle whose area is 78.6 cm squared

Mathematics
2 answers:
vredina [299]3 years ago
7 0
Its 39.15
tell me if I'm wrong

kifflom [539]3 years ago
4 0
The radius is 4.99, im sure
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its 8

Step-by-step explanation:

use ratio solution ..

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9x4 = 36

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6 0
3 years ago
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Which are vertical angles?
miv72 [106K]
Vertical angles are angles opposite each other where two lines cross
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I need help for my daughters homework for write the sentence as an inequality
Taya2010 [7]

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15 < t ÷5

Step-by-step explanation:

all it wants is for you write the sentence as an equation.

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3 0
3 years ago
Suppose 10000 people are given a medical test for a disease. About1% of all people have this condition. The test results have a
Alina [70]

Answer:

The percent of the people who tested positive actually have the disease is 38.64%.

Step-by-step explanation:

Denote the events as follows:

<em>X</em> = a person has the disease

<em>P</em> = the test result is positive

<em>N</em> = the test result is negative

Given:

P(X)=0.01\\P(P|X^{c})=0.15\\P(N|X)=0.10

Compute the value of P (P|X) as follows:

P(P|X)=1-P(P|X^{c})=1-0.15=0.85

Compute the probability of a positive test result as follows:

P(P)=P(P|X)P(X)+P(P|X^{c})P(X^{c})\\=(0.85\times0.10)+(0.15\times0.90)\\=0.22

Compute the probability of a person having the disease given that he/she was tested positive as follows:

P(X|P)=\frac{P(P|X)P(X)}{P(P)}=\frac{0.85\times0.10}{0.22} =0.3864

The percentage of people having the disease given that he/she was tested positive is, 0.3864 × 100 = 38.64%.

3 0
3 years ago
The angle of elevation to a nearby tree from a point on the ground is measured to be
slega [8]

Answer:

186.6

Step-by-step explanation:

Based on the given conditions, formulate: 91 ×tan 64°

Calculate the approximate value: 91×2.050304

= 186.577664

Round the number: 186.6

186.6

6 0
2 years ago
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