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The buses carry, respectively, 35, 44, 34, and 49 students. One of the studetns is randomly selected. Let X denote the number of students that were on the bus carrying this randomly selected student. One of the 4 bus drivers is also randomly selected. Let Y denote the number of students on his bus. Compute the expectations and variances of X and YE(X)=
a paint mixture contains 7 gallons of base for every gallon of color. In 208 gallons of paint, how many gallons of color are there?
Let R be the region bounded by the curves f(x) = ln(x+3) +2 and g(x) = x^2 - 8x + 18. Using the washer method, find the volume of the shape which is formed if R is rotated around the x- axis.
If the box is to have a volume of 72 cubic inches, find the length and width of the cardboard that must be used.
Sketch hyperbola after finding Center, Vertex and Foci of this equation: (y+5)squared/16 - xsquared/9 =1. Please show steps needed
Use the quadratic formula to find out how long after the rocket is launched it will hit the ground. Round to the nearest tenth of a second.
In this case, what is the optimal mix of frames that Ryan should produce, and what is the profit associated with this mix?
Use the given data to find the best predicted value of the response variable.
A point on the bank directly across the river is sighted from another point 200 feet downstream at an angle of 67° 13' . Find the width of the river.
solve equation radio the instructor has learned that for the 30 students in her afternoon class, the radio of student who do not own a computer to those who do is 2 to 1. how many students in the class own their own computer?
Air is being pumped into a spherical balloon at a rate of 20 cubic feet per second. At what rate is the radius of the balloon increasing at the instant when the radius equals 15 feet?
A woman with a resting heart rate of 85 beats per minuteshould keep her heart rate between 139 and 157 beats per minute while excersising. She checks her pulse for 10 seconds while exercising. What should the numbers of beat be?
What is the probability of choosing a queen from a deck of 52 cards? What is the probability of the 2nd card being a queen if the first was a queen? (without replacement)
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