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the speed of train a is 20 mph slower than the speed of train b. train a travels 220 miles in the same time it takes train b to travel 320 miles. find the speed of each train.
Suppose f and g are functions analytic in a domain D. If z_n is a bounded sequence of distinct points in D and if f(z_n) = g(z_n) for all n, show that f(z) = g(z) for all z in D.
an existing rectangular corral such that the total area of the new corral is 1.5 times that of the original corral. the current corral's dimensions are 250 feet by 160 feet. The rancher wants to increase each dimension by the same amount.
The team needs to know how many samples to collect in order to achieve an estimate of the mean with precision of + or - 0.15 mm, with 95% confidence. What sample size is required to meet this goal?
Use Gaussian elimination with partial pivoting to find matrices L and U such that U is upper triangular, L is lower triangular with | l_ij| = j and LU = A', where A' can be obtained from A by interchanging rows.
A merchant has coffee with $20 a pound that she wishes to mix with 70 pounds of coffee $90 a pound to get a mixture that is worth $30 a pound. How many pounds (lb) of the $20 coffee should be used?
A random sample of 30 households was selected from a particular neighborhood. The number of cars for each household is shown below. Estimate the mean number of cars per household for the population of households in the neighborhood. Give the 95% c..
Town A is due south of town B, and their latitudes are 50 degrees N and 32 degrees N, respectively. Use 4000 miles as the radius of the earth and find the distance between the two cities, rounded to the nearest 10 miles.
What is the probability that between 133 and 171 of the business travelers say that the reason for their most recent business trip was an internal company visit?
What is the minimum number of digits the student must obtain from a random number table for each observation if it rained on two-fifths of the days over the past several years
Write an equation of the line which contains the given point, and is parallel to the given line:
Calculate the mode
Which of the following is not a characteristic of an ideal statistician?
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