What’s the area for D=18.6

Atransformation t : (x,y) (x-5,y +3) the image of a(2,-1) 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”?

Klmn and pqrs are similar trapezoids. which side of pqrs corresponds to lm