High school students across the nation compete in a financial capability challenge each year by taking a national financial capability challenge exam. students who score in the top 20 percent are recognized publicly for their achievement by the department of the treasury. assuming a normal distribution, how many standard deviations above the mean does a student have to score to be publicly recognized? (round your answer to 2 decimal places.)

What is the answer to |-2x-5|-|-4+8| and x=7

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?