If the mean of a test is 80 and the standard deviation is 4, how many students scored above

an 80?

50%

68%

34%

95%

which is the right answer?

The volume of a prism is 702 cubic inches of the length is 13 inches and the width is 6 inches what is the height

Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find P34, the 34-percentile.

If sin A = 3/5, which is the value of cos A

At a car repair shop, the cost of a repair depends on the time the mechanic works. Which of the following shows this idea expressed in function notation? A. time (number of cars) B. time (cost) O O O C. cost (time) D. number of cars (time)

If i work 48.40 hrs at 12 dollars an hour what is my gross pay?

After deductions of $45 were withheld this week from Ed's weekly earnings on his part-time job, his take-home pay was $240. Ed had worked 30 hours this week. How much did Ed earn per hour?

omposite figure is divided into two congruent trapezoids, each with a height of 4 cm. 2 trapezoids. Both trapezoids have base lengths of 10 centimeters and 6 centimeters, and a height of 4 centimeters.

During a day a student spends 7 hours sleeping, ¹/4 of the day studying and of the time travelling. What fraction of the day is left for other things?

Simplify (x-5) (x^2-2x-6)

Is 0.05 ... irrational?