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lozanna [386]
3 years ago
10

Jaylon spent $21.60 of the $80 he got for his birthday. What percent of his money did he spend? Oh

Mathematics
2 answers:
Anika [276]3 years ago
5 0

Answer:

27%

Step-by-step explanation:

Jaylon spent 27% of his birthday money.

ioda3 years ago
5 0

Answer:

27%

Step-by-step explanation:

To find the percent spent, take the amount spent and put it over the total

21.60 /80

.27

Multiply by 100% to put in percent form

27%

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Kamila [148]

Answer:

I think 30

Step-by-step explanation:

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which has a greater effect on the volume - changing the radius by a given amount or changing the height by the same amount/ why?
AURORKA [14]
Assuming we’re talking about a cylinder, whose volume formula is V = pi r^2 h…

It will have a greater effect to change a variable’s value that has a greater power on it.

Changing h from 1 to 2 doubles the volume.
Changing r from 1 to 4 quadruples the volume, because 1^2 = 1 and 2^2 = 4. The effect of the change on r is amplified by the power.
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If I have 14 neutrons and 11 electrons, what is my mass number?
Vinil7 [7]

Answer:

A : 25

Step-by-step explanation:

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mass number=protons+neutrons

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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>
5 0
3 years ago
What’s z over 5 to the 2 power
Snowcat [4.5K]
Just square the top and bottom. z^2 over 25
7 0
3 years ago
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