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PSYCHO15rus [73]
3 years ago
14

Graph f(x)=4x^3-4x-2

Mathematics
1 answer:
maw [93]3 years ago
3 0

Answer:

minimum: (\frac{\sqrt{3} }{3} , -\frac{8\sqrt{3} }{9}-2)

maximum: (-\frac{\sqrt{3} }{3} , \frac{8\sqrt{3} }{9}-2)

vertical intercept: (0 , -2)

Step-by-step explanation:

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Use money to explain 0.6 and 0.06
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The mean preparation fee H&amp;R Block charged retail customers in 2012 was $183 (The Wall Street Journal, March 7, 2012). Use t
astraxan [27]

Answer:

a)0.6192

b)0.7422

c)0.8904

d)at least 151 sample is needed for 95% probability that sample mean falls within 8$ of the population mean.

Step-by-step explanation:

Let z(p) be the z-statistic of the probability that the mean price for a sample is within the margin of error. Then

z(p)=\frac{ME*\sqrt{N}}{s } where

  • Me is the margin of error from the mean
  • s is the standard deviation of the population
  • N is the sample size

a.

z(p)=\frac{8*\sqrt{30}}{50 } ≈ 0.8764

by looking z-table corresponding p value is 1-0.3808=0.6192

b.

z(p)=\frac{8*\sqrt{50}}{50 } ≈ 1.1314

by looking z-table corresponding p value is 1-0.2578=0.7422

c.

z(p)=\frac{8*\sqrt{100}}{50 } ≈ 1.6

by looking z-table corresponding p value is 1-0.1096=0.8904

d.

Minimum required sample size for 0.95 probability is

N≥(\frac{z*s}{ME} )^2 where

  • N is the sample size
  • z is the corresponding z-score in 95% probability (1.96)
  • s is the standard deviation (50)
  • ME is the margin of error (8)

then N≥(\frac{1.96*50}{8} )^2 ≈150.6

Thus at least 151 sample is needed for 95% probability that sample mean falls within 8$ of the population mean.

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3 years ago
Enrico is filling his pool. The pool has 3,000 gallons of water now. The water hose used by Enrico puts 500 gallons per hour in
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Answer:

6

Step-by-step explanation:

5 0
3 years ago
Please help. I will give brainliest.
jolli1 [7]
The value calculated by adding all the values of in a data set and dividing the sum by the number of values → Mean

The middle value when all the values are in order from least to greatest → Median

The value that appears most often in a data set → Mode

Hope this helped :)
8 0
3 years ago
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