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goblinko [34]
3 years ago
5

Questão 19 - O preço do quilo da

Mathematics
1 answer:
Flauer [41]3 years ago
3 0

Answer:

D)

Step-by-step explanation:

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On a number line, the surface of a river is marked at -220 feet and the top of a building is marked at +19 feet, where 0 represe
WARRIOR [948]

We want to see what the numbers on the number line represent. We will see that the correct option is A:

<em>"220 feet below sea level and 19 feet above sea level."</em>

<em />

So we know that the surface of the river is at -220ft in the number line, and 19ft represents the top of a building.

We also know that the 0 in the number line is the sea level.

To go from 0 to -220ft, we need to move in the negative range, so we can see that "-220ft" must represent a value that is below the 0, meaning that the "-220ft" represents 220 feet below sea level (remember that the sea level is at 0).

The opposite case is for 19ft, it is in the positive range, then it is above the sea level.

Then the correct option is A:

<em>"220 feet below sea level and 19 feet above sea level."</em>

If you want to learn more about number lines, you can read:

brainly.com/question/13189025

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2 years ago
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3. How is a rational number converted to its decimal form?
Nina [5.8K]
4. division by zero is not allowed because zero has nothing to divide
4 0
3 years ago
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Heheheh yummy have a good
Sveta_85 [38]

Answer:

yum

Step-by-step explanation:

5 0
3 years ago
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A new medical test provides a false positive result for hepatitis 2% of the time that is a perfectly healthy subject being teste
Oxana [17]
Given that X <span>be the number of subjects who test positive for the disease out of the 30 healthy subjects used for the test.

The probability of success, i.e. the probability that a healthy subject tests positive is given as 2% = 0.02


Part A:

</span><span>The probability that all 30 subjects will appropriately test as not being infected, that is the probability that none of the healthy subjects will test positive is given by:

</span>P(X)={ ^nC_xp^x(1-p)^{n-x}} \\  \\ P(0)={ ^{30}C_0(0.02)^0(1-0.02)^{30-0}} \\  \\ =1(1)(0.98)^{30}=0.5455
<span>

Part B:

The mean of a binomial distribution is given by

</span>\mu=np \\  \\ =30(0.02) \\  \\ =0.6
<span>
The standard deviation is given by:

</span>\sigma=\sqrt{np(1-p)} \\ \\ =\sqrt{30(0.02)(1-0.02)} \\ \\ =\sqrt{30(0.02)(0.98)}=\sqrt{0.588} \\  \\ =0.7668
<span>

Part C:

This test will not be a trusted test in the field of medicine as it has a standard deviation higher than the mean. The testing method will not be consistent in determining the infection of hepatitis.</span>
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4 years ago
$45.00 for 9 pounds what is the unit rate?
dmitriy555 [2]
$45/9 pounds
$5 per pound
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3 years ago
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