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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

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  • 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.
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The plywood that adam cut has an area of rectangle that is 9x^4 + 24x^2 + 7x - 3. what is the width...