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%
Answer: 26.67
Step-by-step explanation: multiply 20 and 4/3
3√10^4x is equivalent to -√10 3/4^x and -4√10^3x they are all equivalent
Answer:
B
Step-by-step explanation:
Answer:
-2x + 2
Step-by-step explanation:
you didn't post choices but combining like terms you get
-2x + 2
