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A survey was mailed to a total of 400 students; 100 were randomly selected from each of the freshman, sophomore, junior and senior classes last semester. What sampling method was used?
A. Stratified sample B. Simple random sample C. Cluster sample D. Systematic sample
A mirror in the shape of a paraboloid of revolution. If a light source is located 1 foot from the base along the axis of symmetry and the opening is 2 feet across, how deep should the mirror be?
Who was Richardson's extrapolation named after? What are some of his significant contributions from his work in mathematics and/or related fields? Be sure to include at least one citation and reference for a scholarly source outside of your textbo..
Modeled the word problem mathematically like system of equations and solve by the matrix method - Prepare an equation for the total amount of carbohydrates.
It is a common experience to hear the sound of a low flying airplane, and look at the wrong place in the sky to see the plane. Suppose that a plane is traveling directly toward you at a speed of 200 mph and an altitude of 3,000 feet
The average molecular velocity v (m/s) of a gas in a certain container is given by the formula below, where T is the temperature in kelvins. The temperature is related to the pressure (in atmospheres) by T = 400P. Find the indicated derivative. v=..
I wish to find the general nontrivial solution to the fourth order ODE with boundary conditions
Determine the production level that gives maximum profit, and determine the amount of the maximum profit. (Round your answers to two decimal places.)
on august 18, the ferrnandez family received 19 pieces of mail consisting of magazines, bills, letters, and ads. if they received the same number of magazines as letters, three more bills than letter, and five more ads than bills, how many magazin..
You're at a school fair where one of the games is "Spin the Wheel". Players spin a giant wheel with numbers 1-40. Look at each of the criteria and express the answers as a decimal, fraction and a percentage.
Russ, Don, Pamela, and Stephanie are the first names of four friends who all received sports scholarships. Krieger actually has a full ride, because he is a star in two different sports. Use the clues to determine each person's full name.
A boat's crew rowed 12 miles downstream, with the current, in 1.5 hours. The return trip upstream, against the current, covered the same distance, but took 4 hours. Find the crew's rowing rate in still water and the rate of the current.
how is doing operations-adding,subtracting, multiplying, and dividing- with rational expressions similiar to or different from doing operations with fractions? Can understanding how to work with one kind of problem help understand how to work anot..
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