Consider the following frequency distribution. Class Frequency
20- 29 11
30- 39 14
40- 49 17
50- 59 7
60- 69 1
Construct a cumulative frequency distribution and a cumulative relative frequency distribution. Round your answers to two decimal places, if necessary.
Class Cumulative Frequency Cumulative Relative Frequency
less than or equal to 29
less than or equal to 39
less than or equal to 49
less than or equal to 59
less than or equal to 69

Match the following terms with their definitions. 1. bisector of a segment ray ba and ray bc are opposite rays if a, b, and c are collinear and b (the endpoint of both rays) is between a and c. 2. opposite rays a ray, , is the set of points beginning at point a and going infinitely in the direction of point b. 3. collinear points a line or segment that intersects the segment at its midpoint. 4. betweenness of points a set of two or more points all on the same line. 5. ray the distance between the endpoints of a segment. 6. space point b is between a and c if a, b, and c are collinear and the equation ab + bc = ac is true, where ab, bc, and ac are the distances between points a and b, b and c, and a and c, respectively. 7. midpoint of a segment a set of two or more points all on the same plane. 8. coplanar points the point on a segment that divides the segment into two equal segments. 9. length of a segment the set of all possible points. 10. line segment the set of two different endpoints and all points between them.

Plz hurry evaluate the expression a+b where a=8 and b=19

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”?