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Nana76 [90]
3 years ago
14

Nancy bought a mobile phone marked at $720 at a discount of 20% and she had to pay 5% tax. If Nancy had to put 20% of what she h

ad to pay including tax as a deposit, how much money did she have to pay for the deposit?
$___
Mathematics
1 answer:
Olenka [21]3 years ago
4 0

Answer:

120.96

Step-by-step explanation:

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2. P337. 23. A large box contains 10,000 ball bearings. A random sample of 120 is chosen. The sample mean diameter is 10 mm, and
Rashid [163]

Answer:

B is True

A, C. D are false

Step-by-step explanation:

Given :

Sample size, n = 120

Mean diameter, m = 10

Standard deviation, s = 0.24

Confidence level, Zcritical ; Z0.05/2 = Z0.025 = 1.96

The confidence interval represents how the true mean value compares to a set of values around the mean computed from a set of sample drawn from the population.

The population here is N = 10000

To obtain

Confidence interval (C. I) :

Mean ± margin of error

Margin of Error = Zcritical * s/sqrt(n)

Margin of Error = 1.96 * 0.24/sqrt(120)

Confidence interval for the 10,000 ball bearing :

10 ± 1.96 * (0.24) / sqrt(120)

Hence. The confidence interval defined as :

10 ± 1.96 * (0.24) / sqrt(120) is the 95% confidence interval for the mean diameter of the 10,000 bearings in the box.

4 0
3 years ago
1. 5/2=-x/11<br><br> 2. 9/m=-4/11
alex41 [277]

Answer:

1. x = 55/2

2. x = - 99/4

5 0
3 years ago
BRAINLIST and POINTS help
dimaraw [331]

Answer:

58

Step-by-step explanation:

9*a=63-b=58

because a=7 and b=5

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daniel's basketball team won 23 games and lost 8 games. Write the ratio of wins to losses in simplest form.
Soloha48 [4]
23:8 is the simplest form. However, you can put 5.75:2 or even 2.86/1 if you are looking for the absolute simplest
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3 years ago
What is the result of 0.378 divided 100?<br> 0.00378<br> 0.0378<br> 3.78<br> 37.8
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The answer is 0.00378
3 0
3 years ago
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