Mathematics, 25.02.2020 00:46 milonirishovnsez
There are 43 students in an elementary statistics class. On the basis of years of experience, the instructor knows that the time needed to grade a randomly chosen first examination paper is a random variable with an expected value of 5 min and a standard deviation of 4 min. If grading times are independent and the instructor begins grading at 6:50 P. M. and grades continuously, what is the (approximate) probability that he is through grading before the 11:00 P. M. TV news begins? (Round your answers to four decimal places.)
Answers: 1
Mathematics, 21.06.2019 12:30, emmabarnett817
Which of the following transformations does not preserve congruence? * 5 points a. (x, y) → (y − 3, x − 3) b. (x, y) → (x + 5, y − 1) c. (x, y) → (y + 9, −x + 2) d. (x, y) → (3x + 1, 3y − 2)
Answers: 3
Mathematics, 21.06.2019 18:50, jen12abc82
The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9
Answers: 1
Mathematics, 21.06.2019 22:00, Thejollyhellhound20
The sum of the speeds of two trains is 720.2 mph. if the speed of the first train is 7.8 mph faster than the second train, find the speeds of each.
Answers: 1
There are 43 students in an elementary statistics class. On the basis of years of experience, the in...
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