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bonufazy [111]
3 years ago
13

Factor 81a^2b^4-c^6 completely

Mathematics
1 answer:
olga nikolaevna [1]3 years ago
3 0

Answer: (9ab^2+c^3)(9ab^2-c^3)

Step-by-step explanation:

81a^2b^4-c^6

(9ab^2)^2-(c^3)^2

(9ab^2+c^3)(9ab^2-c^3)

Hope this helps, HAVE A BLESSED AND WONDERFUL DAY! As well as a great Superbowl Weekend! :-)

- Cutiepatutie ☺❀❤

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abruzzese [7]
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I hope this helps.
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What the square area with side length of 3/5 units
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Answer:

9/25 units^2

Step-by-step explanation:

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What is the answer Simplify. 1/4(1-2/3 squared+1/3
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3 0
3 years ago
Based on a sample of 150 textbooks at the store, you find an average of 70.69 and a standard deviation of 29.6. The point estima
Ugo [173]

Answer:

Step-by-step explanation:

Given that:

The sample size = 150

The sample mean = 70.69

The standard deviation = 29.60

The sample mean is equal  to the point estimate of the population = 70.69

At 99% confidence interval level is:

∝ = 1 - 0.99

∝ = 0.01

The critical value:

Z_{\alpha/2} = Z_{0.01/2} \\ \\  Z_{0.005} = 2.58  \ using \ Z \ tables

The Margin of error = Z_{\alpha/2} \times \dfrac{\sigma}{\sqrt{n}}

= 2.58 \times \dfrac{29.6}{\sqrt{150}}

= 2.58 × 2.4168

≅ 6.235

At 99% confidence interval; the estimate of the population mean lies within the interval:

= \overline x - E < \mu \ < \overline x + E

= 70.69 - 6.235 < μ <  70.69 + 6.235

= 64.455  < μ < 76.925

= (64.455 , 76.925 )

6 0
3 years ago
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