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prohojiy [21]
3 years ago
5

What is the product of −214 and 212?

Mathematics
2 answers:
Oksi-84 [34.3K]3 years ago
8 0
Do you mean, -214/212. or, 45,368/1 ??


Sunny_sXe [5.5K]3 years ago
6 0

Answer:

-5\frac{5}{8}

Step-by-step explanation:

Given : -2\frac{1}{4} and 2\frac{1}{2}

To Find : What is the product

Solution :

Numbers are  -2\frac{1}{4} and 2\frac{1}{2}

We are supposed to find the product

\Rightarrow -2\frac{1}{4} \times 2\frac{1}{2}

\Rightarrow \frac{-9}{4} \times \frac{5}{2}

\Rightarrow \frac{-45}{8}

\Rightarrow -5\frac{5}{8}

Hence the product is -5\frac{5}{8}

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In a random sample of 200 Americans, 51% said they favor building more nuclear power plants. In a random sample of 150 French, 4
Varvara68 [4.7K]

Answer:

Yes, there is enough evidence to say the proportions are the same.

Step-by-step explanation:

Null hypothesis: The proportions are the same.

Alternate hypothesis: The proportions are not the same.

Data given:

p1 = 51% = 0.51

n1 = 200

p2 = 48% = 0.48

n2 = 150

pooled proportion (p) = (n1p1 + n2p2) ÷ (n1 + n2) = (200×0.51 + 150×0.48) ÷ (200 + 150) = 174 ÷ 350 = 0.497

Test statistic (z) = (p1 - p2) ÷ sqrt[p(1-p)(1/n1 + 1/n2) = (0.51 - 0.48) ÷ sqrt[0.497(1-0.497)(1/200 + 1/150)] = 0.03 ÷ 0.054 = 0.556

The test is a two-tailed test. At 0.10 significance level the critical values -1.645 and 1.645

Conclusion:

Fail to reject the null hypothesis because the test statistic 0.556 falls within the region bounded by the critical values.

8 0
3 years ago
At the dog show, there are 4 times as many boxers as spaniels. If there are a total of 30 dogs, how may dogs are spaniels?
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There are 6 spaniels
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Work out (5.32 x 10^-7): (2.5 x 10^-5)<br>Give your answer in standard form​
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Answer:

1.33×10^-6

Step-by-step explanation:

5.32 x 10^-7= 5.32×10^(-5-2)= 5.32×10^-2×10^(-5)

=0.0532×10^-5

(0.0532×10^-5) (2.5 x 10^-5)

0.0532×2.5 × 10^-5

0.133×10^-5= 1.33×10^-1 ×10^-5

1.33×10^-6

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3 years ago
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Answer:

{-5, -4, -2, -1, 2, 3}

Step-by-step explanation:

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3 years ago
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