The plywood that adam cut has an area of rectangle that is 9x^4 + 24x^2 + 7x - 3. what is the width of the plywood if it’s length is x+4? .

Answers

• Réponse publiée par: christiandumanon

  so 1 peson = 40 hours

  now for the moment of truth

  the answer is 3. repeating hours

  but we can still solve it cuz we are talking bout' time

  so if 40/12 is 3 and three is the remainder

  and the closest multiple is 48

  48-40=8

  8 of 12 is 66.

  or 2/3 of 100

  so 2/3 in minutes is 40

  so the answer is 3 hours and 40 minutes

• Réponse publiée par: nelspas422

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• Réponse publiée par: christiandumanon

  Ithink that's 30240
• Réponse publiée par: camillebalajadia

  Confidence interval for the population mean
  z-test or normal distribution
  solution:
  given:  
  n=20, x̄ =89, s=2.0, 99% 
  formula:
  x̄ -z_alpha/2(s/square root of n)< µ< x̄ +z_alpha/2(s/square root of n)
  89-(2.575)(2.0/square root of 20)< µ< 89-(2.575)(2.0/square root of 20)
  87.848< µ< 90.152
  
  margin of error:
  solution:
  the critical value is 2.575.
  the standard deviation is 2.0 (from the question), but as this is a sample, we need the standard error for the mean. 
  the formula for the se of the mean is  standard deviation / √(sample size), so: 2.0/ √(20)=0.447.
  me=2.575 * 0.447 = 1.151.
  
  therefore, the margin of error is 1.151  with the confidence interval of 87.848< µ< 90.152.