The strength of an aluminum alloy is normally distributed with mean 11 gigapascals ( GPa) and standard deviation 1.44 GPa. a. What is the probability that a specimen of this alloy will have a strength greater than 12.8 GPa

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min

The random variable x is defined as the number marking the sector in which the arrow lands when the spinner in the diagram is spun once.