Answer: C. 12 girls
Step-by-step explanation:
Answer:
34%
Step-by-step explanation:
Given that the distribution of daily light bulb request replacement is approximately bell shaped with ;
Mean , μ = 45 ; standard deviation, σ = 3
Using the empirical formula where ;
68% of the distribution is within 1 standard deviation from the mean ;
95% of the distribution is within 2 standard deviation from the mean
Lightbulb replacement numbering between ;
42 and 45
Number of standard deviations from the mean /
Z = (x - μ) / σ
(x - μ) / σ < Z < (x - μ) / σ
(42 - 45) / 3 = -1
This lies between - 1 standard deviation a d the mean :
Hence, the approximate percentage is : 68% / 2 = 34%
I might not know the answer to this question but I hope you find one
Answer:
(x - 9)(x + 4)
Step-by-step explanation:
x^2−5x−36
As you know, -36 = -9 * 4 and (-9) + 4 = -5
so Factor
= (x - 9)(x + 4)
