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2 years ago

Help me please i dont understand

Mathematics

1 answer:

notka56 [123]2 years ago

5 0

Answer:

96 ft^2.

Step-by-step explanation:

Area of shaded region = area of the original rectangle - area of the one removed

= 8 * 16 - 8*4

= 128 - 32

= 96

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4 years ago

Multiply (a + b + c ) (a + b + c)

saveliy_v [14]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

In a recent study of statistics students, a random sample of students were asked to provide the number of hours per week they sp

Airida [17]

Answer:

$ME=\frac{Upper-Lower}{2}= \frac{8.15-6.55}{2}= 0.80$

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

s represent the sample standard deviation

n represent the sample size

Solution to the problem

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

For this case the confidence interval is given by (6.55,8.15). And we can estimate the margin of error with this formula since the confidence interval is symmetrical:

$ME=\frac{Upper-Lower}{2}= \frac{8.15-6.55}{2}= 0.80$

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3 years ago

An engineer scale model shows a building that is 3 inches tall. If the scale is 1 inch = 600 feet, how tall is the actual buildi

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Step-by-step explanation:

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3 years ago

Which of the following expression is equivalent to 35+14

Korvikt [17]

Answer:

Step-by-step explanation:

I would add the tens place and ones place together. The tens place; is 30+10 (From the 3 and 1 in the tens place) and 5+4, which is 40+9, which is 49.

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3 years ago