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An analysis of the grades on the first test in Statistics 101 revealed that they approximate a normal curve with a mean of 75 and a standard deviation of 8. The instructor wants to award the grade of A to the upper 10 percent of the test grades. What is the dividing point between an A and a B grade?
a chef wants to make 1 gallon (128ounces) of 80% vinegar to oil salad dressing. he only has pure vinegar and a mild 4% vinegar to oil salad dressing on hand. how many ounces of each should he mix to make the desired dressing?
three tennis balls are tightly packed one of top of each other in a cylindrical can. what fraction of the volume of the can is occupied by the tennis balls?
a 42 inch- long guitar is 10.5-feet-long on a stadium screen. a drum is 21 inches wide. how wide is the image on the stadium screen?
The measure of three of the angles of a quadrilateral are 67, 112, and 55 degree. What is the measure of the fourth angle?
An air conditioning manufacturer produces room air conditioners at plants in Houston, Phoenix, and Memphis. These are sent to regional distributors in Dallas, Atlanta, and Denver. The shipping costs vary, and the company would like to find the lea..
the base of a triangular field is three times its altitude. If the cost of sowing the field at rs 58 per hectare is rs 783 ,find its base and height.
Mike, who is standing on the deck of a yacht that is traveling due west at 6km/h, sees a sailboat sailing southwest at 4km/h, 3 km northwest of the yacht. How close to each other do these boats get?
the area of a trapezoid is 198 cm2. The height is 22 cm and the length of one of the parallel sides is 7 cm. Find the length of the second parallel side.
You are required to design a 1000cm3 of a shaped right circular cylinder. What dimension will use the least materials.
A sample of 100 provided a sample mean of 75.7. The population standard deviation is known to be 12. At 0.01 level of significance, what is your conclusion? Use either the p-value approach on the critical value of approach.
Evaluate the velocity vector at a particular point, vector projection of acceleration and the length of the curve between two points.
a company car has a seating capacity of 8 is to be used by 8 employees who have formed a car pool. if only 3 of theses employees can drive, how many possible seating arrangements are there for the group?
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