What is the range of the following relation? {(10, 14), (-5, 16), (12, 14), (-5, 18)}
A-5
B 16
C14
D 18

Which point on the x-axis lies on the line that passes through point c and is parallel to lino ab?

Evaluate cos2θ for cosθ = square root of 3/2

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”?