Answer: 11.9%
Step-by-step explanation:
Given : On a stretch of Interstate-89, car speed is a normally distributed variable with
mph and
mph.
Let x be a random variable that represents the car speed.
Since , ![z=\dfrac{x-\mu}{\sigma}](https://tex.z-dn.net/?f=z%3D%5Cdfrac%7Bx-%5Cmu%7D%7B%5Csigma%7D)
z-score corresponds x = 73 , ![z=\dfrac{73-69.1}{3.3}\approx1.18](https://tex.z-dn.net/?f=z%3D%5Cdfrac%7B73-69.1%7D%7B3.3%7D%5Capprox1.18)
Required probability :
![\text{P-value }: P(x>73)=P(z>1.18)\\\\=1-P(z](https://tex.z-dn.net/?f=%5Ctext%7BP-value%20%7D%3A%20P%28x%3E73%29%3DP%28z%3E1.18%29%5C%5C%5C%5C%3D1-P%28z%3C1.18%29%5C%5C%5C%5C1-0.8809999%5C%5C%5C%5C%3D0.1190001%3D11.90001%5Capprox11.9%5C%25)
[using z-value table.]
Hence, the approximate percentage of cars are traveling faster than you = 11.9%
Answer:
C: a reflection across the y axis rotated 180 degrees
Step-by-step explanation:
The y axis is a vertical line, the same like that the trapezoid is flipped across
The trapezoid is rotated 180 degrees across the y axis
You are asked to find the error. The error is that 4,100,000 is the answer to 4.1×10^6, not 4.1×10^-6. The correct answer to 4.1×10^-6 is 1/4,100,000.
Answer:
where is the diagram or the explanation of the circle?
you start with -8 then rise 2 per hour, so this would be +2x.
D. y = 2x - 8