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r-ruslan [8.4K]
3 years ago
5

The number of students in a math club decreased from 15 to 11. What is the percent decrease? Round to the nearest percent.

Mathematics
1 answer:
Alinara [238K]3 years ago
4 0

Answer:

27%

Step-by-step explanation:

Decrease= 15-11

=4

Percentage=4÷15

=0.266666667

=26.667%

~27%

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An IQ test is designed so that the mean is 100 and the standard deviation is 12 for the population of normal adults. Find the sa
Julli [10]

Answer:

Step-by-step explanation:

Given that IQ mean is 100 and std dev = 12 for normal adults

Confidence level =90%\\Z critical value = 1.645\\Margin of error = 2\\Margin of error = 1.645* std error =2\\Std error = 1.216

Std error = \frac{12}{\sqrt{n} } =1.216

n=(\frac{12}{1.216} )^2 =97.38

i.e. sample size should be atleast 97

The required sample size is 97.

This is reasonable as this is greater than 30

Yes. This number of IQ test scores is a fairly large number.

5 0
3 years ago
The price of a technology stock was $9.74 yesterday. Today, the price fell to $9.67. Find the percentage decrease. Round your an
agasfer [191]
% change = (new value - old value)/(old value) * 100%
.. = (9.67 -9.74)/9.74 * 100%
.. = -0.07/9.74 * 100%
.. = -0.7%

The decrease is 0.7%.
5 0
3 years ago
What's 5x3833 in an equation divided by two
Xelga [282]
You mean the answer of 5x3833 divided by two?

7 0
3 years ago
100PNTS! I desperately need help/answers to these please :(
kotykmax [81]

Answer:

1a- Alternate Exterior Angles

1b- Alternate Interior Angles

1c-Alternate Exterior Angles

1d-Alternate Interior Angles

1e-Alternate Exterior Angles

1f-Alternate Interior Angles

2a-None

2b-None

2c-Alternate Exterior Angles

2d-None

2e-Alternate Interior Angles

2f-None

2g-None

2h-None

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2j-None

6 0
3 years ago
⦁ Write an equation of a line in slope intercept form (y = mx + b) with slope 1/3 going through the point (-6, 2). Show your wor
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(\stackrel{x_1}{-6}~,~\stackrel{y_1}{2})\qquad \qquad \stackrel{slope}{m}\implies \cfrac{1}{3} \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{2}=\stackrel{m}{\cfrac{1}{3}}(x-\stackrel{x_1}{(-6)}) \\\\\\ y-2=\cfrac{1}{3}(x+6)\implies y-2=\cfrac{1}{3}x+2\implies y=\cfrac{1}{3}x+4

3 0
2 years ago
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