In the past 4 years, a sporting goods store had two yearly losses of $110,000 and $22,000 and two yearly profits of $140,000 and $80,000.

what was the net profit or loss over 4 years?

a.
–$132,000

b.
–$88,000

c.
$88,000

d.
$220,000

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?