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MrRa [10]
3 years ago
14

Which expression did he write

Mathematics
1 answer:
Naddik [55]3 years ago
4 0
D. (4×0.4)+(4×0.07)=?????
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Round 652,053,730 to the nearest hundred thousand
skelet666 [1.2K]
652,100,000 is the answer :D

6 0
3 years ago
It is generally claimed that the average body temperature for healthy human adults is 98.6°F. To test this claim a simple random
Rzqust [24]

Answer:

Explained below.

Step-by-step explanation:

The information provided is as follows:

\mu=98.6^{o}F\\\bar x=98.1^{o}F\\s=0.9^{o}F\\n=9

(1)

A single mean test is to be performed in this case.

As the population standard deviation is not provided, a one-sample <em>t</em>-test will be used.

The correct option is b.

(2)

The null hypothesis is:

<em>H</em>₀: The average temperature in the population is 98.6°F, i.e. <em>μ </em>= 98.6°F.

The correct option is b.

(3)

The alternative hypothesis is:

<em>Hₐ</em>: The average temperature in the population is less than 98.6°F, i.e. <em>μ </em>< 98.6°F.

The correct option is c.

(4)

The standard deviation of the sample mean is as follows:

SD_{\bar x}=\frac{s}{\sqrt{n}}=\frac{0.9}{\sqrt{9}}=0.3^{o}F

Thus, the value of SD is 0.3°F.

(5)

Compute the value of test statistic as follows:

t=\frac{\bar x-\mu}{SD_{\bar x}}

  =\frac{98.1-98.6}{0.3}\\\\=-1.666666667\\\\\approx -1.67

Thus, the value of test statistic is -1.67.

(6)

The degrees of freedom of the test are:

df = n - 1

   = 9 - 1

   = 8

Thus, the degrees of freedom of the test is 8.

8 0
3 years ago
What is the arc measure of arc ​AB​​ on circle P in degrees?
Nastasia [14]

Answer:

measure of arc ​AB = 74°

Step-by-step explanation:

360 - 286 = 74

6 0
3 years ago
Julio can buy a box of 20 pencils<br> for $2.80. What is the unit rate in<br> dollars per pencil?
Mice21 [21]

Answer:

$0.14

Step-by-step explanation:

When you divide the cost of pencils to the amount the pencils is the amount of each pencil.

3 0
3 years ago
Dan earns £9.80 per hour how much will I earn for eight hours work
Andrews [41]

Answer:

£78.4

Step-by-step explanation:

Since he earns £9.80 per hour, we multiply this by how many hours there are. So £9.80 times 8 is £78.4. I hope this helps!

6 0
3 years ago
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