In the figure, lines m and n are parallel to each other. Lines p and q are also parallel to each other. What is the value of x? A. 40° B. 80° C. 100° D. 180°

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.

52 cm radius = diameter = area = circumference = circumfer

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”?