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A salt-water mixture is being added to a tank at 4 L/min. The mixture has a concentration of .03 kg/L. The tank is initially filled with 60 L of water in which 3 kg of salt is dissolved. The tank mixture is being drained at 4 L/min. Find the formula for x(t), the number of kg of salt in the tank at time t.
Let U = {60 Minutes, American Idol-Tues., American Idol-Wed., CSI, CSI: Miami, Desperate Housewives, Friends, Grey's Anatomy, Law & Order, The Apprentice}. Construct a Venn diagram illustrating the sets.
for your first discussion please tell us a problem that you solved and how george polyas guidelines applied. do not
How many tennis rackets of each type should CSD manufacture over the next two weeks to maximize the total profit contribution? Assume that because of the unique nature of their products, CSD can sell as many rackets as they can produce.
determining the height at which the light has to be fixed to get its use in maximum area using its perimeter
Let L:R^n -->R^n be a linear operator on R^n. suppose that L(x) = 0 for some x does not equal 0. Let A be the matrix representing L with respect to standard basis. Show that matrix A is singular.
A man rows a boat 480 feet upstream against a constant current in 8 minutes. He then rows 210 feet downstream ( with the same current) in 3 minutes. Find the speed of the current and the equivalent rate at which he can row in still water.
The formula A = 6s^2 will calculate the surface area of cube. Suppose you have a cube that has a surface are of 216 in ^2. What is the length of each side?
A normal human body temperature is 98.6°F. What is the corresponding Kelvin temperature?
Which kind of topics will come up in a math diagnostic test for a 10th grade student? Are these questions hard to answer?
A gun has a muzzle speed of 100 meters per second. What angle of elevation should be used to hit an object 190 meters away? Neglect air resistance and use as the acceleration of gravity.
Supppose a baseball is thrown at 85 miles per hour.The ball will travel 320 ft when hit by a bat swung at 50 miles per hour and will travel 440 ft when hit by a bat swung at 80 miles per hour.
find the area of the triangle a alpha 20 degrees b 11 and c 9. please show all of your
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