Mathematics, 26.11.2021 22:00 Serenitybella
The times of the runners in a marathon are normally distributed, with a mean of 3 hours and 50 minutes and a standard deviation of 30 minutes. What is the probability that a randomly selected runner has a time less than or equal to 3 hours and 20 minutes? Use the portion of the standard normal table below to help answer the question. Z Probability 0. 00 0. 5000 0. 50 0. 6915 1. 00 0. 8413 2. 00 0. 9772 3. 00 0. 9987 16% 32% 34% 84%.
Answers: 2
Mathematics, 21.06.2019 14:00
You and a friend race across a field to a fence and back. your friend has a 50-meter head start. the equations shown represent you and your friend's distances dd (in meters) from the fence tt seconds after the race begins. find the time at which you catch up to your friend. you: d=∣−5t+100∣d=∣−5t+100∣ your friend: d=∣−313t+50∣∣
Answers: 2
Mathematics, 21.06.2019 20:00
Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. 4x^2 + 20x + 25 = 0
Answers: 2
The times of the runners in a marathon are normally distributed, with a mean of 3 hours and 50 minut...
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