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lord [1]
3 years ago
15

Please answer the question correctly while showing detailed working. ​

Mathematics
2 answers:
AfilCa [17]3 years ago
7 0

Answer: 2

Step-by-step explanation:

8^2x+1 / 8^2 = 8^3

8^2x+1  = 8^5

2x+1= 5

2x= 4

x= 2

algol133 years ago
7 0

\\ \sf\longmapsto \dfrac{8^{2x+1}}{64}=8^3

\\ \sf\longmapsto \dfrac{8^{2x+1}}{8^2}=8^3

  • a^m÷a^n=a^{m-n}

\\ \sf\longmapsto 8^{2x+1-2}=8^3

\\ \sf\longmapsto 8^{2x-1}=8^3

\\ \sf\longmapsto 2x-1=3

\\ \sf\longmapsto 2x=3+1

\\ \sf\longmapsto 2x=4

\\ \sf\longmapsto x=\dfrac{4}{2}

\\ \sf\longmapsto x=2

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Answer:

87.29%

Step-by-step explanation:

Given: Mean= 68.8 inches

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Now, finding the percent of the men in the sample were greater than 72 inches.

We know, z-score= \frac{x-mean}{standard\ deviation}

z-score= \frac{72-68.8}{2.8}

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Next, using normal distribution table to find percentage.

Coverting 0.8729 into percentage= 0.8729\times 100

We get the percentage as 87.29%

Hence, 87.29% of the men in the sample were greater than 72 inches.

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the answer should be 30
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C: 60.9% is the right answer

Step-by-step explanation:

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Hence,

C: 60.9% is the right answer

Keywords: Markup, Percentage

Learn more about percentage at:

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