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Korolek [52]
2 years ago
11

5. Expla in why 4 is or is not a multiplicative inverse mod 10 of 7.

Mathematics
1 answer:
AnnZ [28]2 years ago
5 0

Answer:

  4 is not. (3 is)

Step-by-step explanation:

A number is the multiplicative inverse of 7 (mod 10) if the product mod 10 is 1.

7 × 4 mod 10 = 28 mod 10 = 8 . . . . not 1

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According to Thomson Financial, last year the majority of companies reporting profits had beaten estimates. A sample of 162 comp
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Answer:

0.1790

0.0738 , 0.5800, 0.7040

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a. Given:  

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z_\alpha/2 = 1.96  

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n = 162

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p =x/n

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Formula sample size:

p known: n = [z_\alpha/2 ]^2*pq/E^2

                   = [z_\alpha/2 ]^2*p(1-p)/E^2

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For confidence level 1 –\alpha= 0.95, determine z_\alpha/2 = z_o.025 using table 1 (look up 0.025 in the table, the z-score is then the found z-score with opposite sign):  

z_\alpha/2  = 1.96

p is known, then the sample size is (round up!):

n =[z_\alpha/2 ]^2*p(1-p)/E^2

  = 354

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