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4 years ago

Can someone answer number nine for me

Mathematics

1 answer:

sweet [91]4 years ago

5 0

Ground level is 0

who is closer to ground level...
-20 7/9 = - 20.77 (with a line over the 7 because it is repeating)
-20 39/50 = -20.78

so, closer to ground level is the black garden ant at -20 7/9 ft because this is closer to 0 then -20 39/50 ft.

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I need the answer please

Anarel [89]

Answer:

22 degrees

Step-by-step explanation:

Since both triangles correspond, side x is correspondent to 22 degrees, Since that is also the only given piece of information, that is your answer.

7 0

3 years ago

Evaluate: 13 × 20 – 15 × 9 + 20 × 7 – 6 × 15.

ddd [48]

Answer:

175

Step-by-step explanation:

13 × 20 – 15 × 9 + 20 × 7 – 6 × 15 = 175

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3 years ago

A bacteria population doubles every minute. Explain why this population growth cant be modeled on a graph

Kisachek [45]

Answer:

It can be modeled on an exponential graph

Step-by-step explanation:

Bacteria is doubling by the minute. This means that if there are 2 bacteria in the first minute, there would be 4 in the second, 8 in the third, 16 in fourth, and so on. This can be modeled using an exponential graph, where a number is constantly increasing by multiplying.

3 0

3 years ago

PLEASE someone do this math EASY picture attached

ziro4ka [17]

Hey there! :)

5/8 ÷ 3/2 = (5/8 × 2/3) = 10/24 = 5/12

5/12 × 2/3 = 10/36 = 5/18

Your answer is 5/18

Hope this helps :)

4 0

3 years ago

Read 2 more answers

he Nassau Bahamas Community College (NBC) claims that students who take statistics spend on average 19 hours a week working. The

Virty [35]

Using the t-distribution, it is found that since the test statistic is greater than the critical value for the right-tailed test, it is found that there is enough evidence to conclude that the students' claim that they work more than 19 hours is correct.

At the null hypothesis, it is tested if they spend on average 19 hours a week working, that is:

$H_0: \mu = 19$

At the alternative hypothesis, it is tested if they spend more than 19 hours a week working, that is:

$H_1: \mu > 19$

We have the standard deviation for the sample, hence, the t-distribution is used.

The test statistic is given by:

$t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}$

The parameters are:

$\overline{x}$ is the sample mean.

$\mu$ is the value tested at the null hypothesis.

s is the standard deviation of the sample.

n is the sample size.

Searching the problem on the internet, it is found that the values of the parameters are:

$\overline{x} = 24.2, \mu = 19, s = 12.59, n = 25$

Hence, the value of the test statistic is:

$t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}$

$t = \frac{24.2 - 19}{\frac{12.59}{\sqrt{25}}}$

$t = 2.07$

The critical value for a right-tailed test, as we are testing if the mean is greater than a value, with a significance level of 0.05 and 25 - 1 = 24 df is of $t^{\ast} = 1.71$

Since the test statistic is greater than the critical value for the right-tailed test, it is found that there is enough evidence to conclude that the students' claim that they work more than 19 hours is correct.

To learn more about the t-distribution, you can take a look at brainly.com/question/13873630

3 0

3 years ago