What is the area of this irregular figure?

The vertices of a triangle are a(7.5), b(4,2), and c19. 2). what is

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”?

Which strategy is used by public health to reduce the incidence of food poisoning?