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WITCHER [35]
3 years ago
15

$800 deposited in a savings account earns 3% simple interest a year will earn $168 in interest in 7 years

Mathematics
2 answers:
Ksenya-84 [330]3 years ago
7 0
This is true.

800 * 0.03 * 7 = 968
968 - 800 = 168 interest
Oksanka [162]3 years ago
4 0
800*3=2,400+168*7=1796
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Answer:

$695

Step-by-step explanation:

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5 0
3 years ago
Assume, for the sake of this question, that the data were collected through a well-designed, well-implemented random sampling me
amid [387]

Answer:

Since the pvalue of the test is 0.2743 > 0.1, the threshold probably was met.

Step-by-step explanation:

The widget manufacturing company had established a threshold of 60% preferring the proposed new widget to move forward with producing the new widgets.

This means that at the null hypothesis we test if the proportion is at least 60%, that is:

H_{0}: p \geq 0.6

And the alternate hypothesis is:

H_{a}: p < 0.6

The test statistic is:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, \sigma is the standard deviation and n is the size of the sample.

0.6 is tested at the null hypothesis:

This means that:

\mu = 0.6

\sigma = \sqrt{0.6*0.4}

Three hundred thirty-eight of 575 respondents reported preferring the proposed new widget.

This means that n = 575, X = \frac{338}{575} = 0.5878

Value of the test-statistic:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

z = \frac{0.5878 - 0.6}{\frac{\sqrt{0.6*0.4}}{\sqrt{575}}}

z = -0.6

Pvalue of the test and decision:

We want to find the probability of a proportion of 0.5878 or lower, which is the pvalue of z = -0.6.

Looking at the z-table, z = -0.6 has a pvalue of 0.2743.

Since 0.2743 > 0.1, the threshold probably was met.

3 0
3 years ago
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Answer:

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Step-by-step explanation:

If she uses 1/2 of a paper towel roll each week and there are twelve weeks, divide the number of weeks by the number of paper towel rolls she uses.

3 0
3 years ago
Find the slope of (2,-3) and (-3,2)
victus00 [196]

Answer:

m= -1

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
An Olympic hurdler was part of the way through her race when she fell. She got up and completed the final 353535 meters of her 1
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she falled at 99746565 step before completing the race

5 0
3 years ago
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