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2 years ago

Rewrite the following expression using base only once 7^6 x 7^8

Mathematics

1 answer:

chubhunter [2.5K]2 years ago

3 0

Answer:

$7^{14}$

Step-by-step explanation:

Using the rule of exponents

$a^{m}$ × $a^{n}$ = $a^{(m+n)}$ , then

$7^{6}$ × $7^{8}$ = $7^{(6+8)}$ = $7^{14}$

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3 years ago

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Population in the city= 10,000

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As, it is also given that, there is an error rate of 1% for condition (i.e., 1% false negatives and 1% false positives).

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Also, 1% false positives means out of 10,000 tested,[10,000-800= 9200] who are found not affected , means there are chances that 1% who was found not affected can be affected also.

So, 1% of 9200 $=\frac{1}{100}\times 9200=92$

1. Has condition Does not have condition totals = 800

2. Test positive =92

3. Test negative =8

4. Total =800 +92 +8=900

5. Probability (as a percentage) that a person has the condition if he or she tests positive= As 8% are found positive among 10,000 means 9200 are not found affected.But there are chances that out of 9200 , 1% may be affected

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3 years ago

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Answer:

Step-by-step explanation:

here is a solution :

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