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castortr0y [4]
3 years ago
15

What is 7 x 7 x 7 written using an exponent?

Mathematics
1 answer:
Darina [25.2K]3 years ago
3 0

Answer:

7x7x7=7^3

Step-by-step explanation:

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Find the perimeter of the shape below:
GuDViN [60]

Answer:The perimeter is 13.6

Step-by-step explanation:

This gives us a perimeter of 13.6

4 0
3 years ago
Read 2 more answers
In a previous​ year, 51​% of females aged 15 and older lived alone. A sociologist tests whether this percentage is different tod
Yanka [14]

Answer:

Given:

n = 550

Po = 51% = 0.51

P0 - 1 = 0.51 - 1 = 0.49

p' = \frac{287}{550} = 0.5218

np0(1 - p0) = 550*0.51(1-0.51)

= 137.4 ≥ 100

This means the sample size is greater than 5% of the population size. and the sample can be reasonably assumed to be random, the requirement for testing hypothesis are satisfied.

1) The null and alternative hypotheses:

H0 : p0 = 0.51

H1 : p0 ≠ 0.51

The test statistic Z,

Z = \frac{p' - p_0}{\sqrt{\frac{p_0(1-p_0)}{n}}}

Z = \frac{0.5218 - 0.51}{\sqrt{\frac{0.51(1-0.51)}{550}}}

Z = 0.55

This is two tailed test.

The pvalue for Z =0.55

Pvalue = 0.5824

3) Decision:

Since pvalue, 0.5824 is greater than significance level, we fail to reject null hypothesis H0.

Conclusion:

Do not reject Upper H0. There is not sufficient evidence at the alpha equals 0.01 level of significance to conclude that the proportion of females who are living alone has changed.

8 0
3 years ago
What expression is equivalent to 3(2t + 6) -4t
tekilochka [14]

Answer: 2t + 18

Step-by-step explanation:

3 0
3 years ago
Please help here too, idk this is hard for me
slamgirl [31]

Answer:

47 degrees

Step-by-step explanation:

half of a circle is 180

180-133=47

6 0
3 years ago
Use logarithm table to evaluate (3.68)2 x 6.705​
SVEN [57.7K]

Answer:

Step-by-step explanation:

49.3488

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1 year ago
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