A car that travels along the highway to Denver at a steady speed. When it begins, it is 300 miles from Denver. After 3 hours, it
2 answers:
Answer:
Step-by-step explanation:
Let x be the time (in hours) and y be the distance from Denver (in miles).
When car begins, it is 300 miles from Denver, so x = 0 hours and y = 300 miles.
After 3 hours, it is 180 miles from Denver, then x = 3 hours and y = 180 miles.
Write the equation of the line passing through the points (0,300) and (3,180). The slope of this line is
y-intercept is at (0,300), hence the equation of the line is
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Answer:
0.2805
Step-by-step explanation:
Given that p = 20% = 0.2, n = 300.
The mean (μ) = np = 0.2 * 300 = 60
The standard deviation (σ) =
The z score is used to determine by how many standard deviations the raw score is above or below the mean. The z score is given by:
For x = 57:
For x = 62:
From the normal distribution table, P(57 < x < 62) = P(-0.43 < z < 0.29) = P(z < 0.29) - P(z < -0.43) = 0.6141 - 0.3336 = 0.2805