The mean work week for engineers in a start-up company is believed to be about 60 hours. a newly hired engineer hopes that it's shorter. she asks 10 engineering friends in start-ups for the lengths of their mean work weeks. based on the results that follow, should she count on the mean work week to be shorter than 60 hours? data (length of mean work week): 70; 45; 55; 60; 65; 55; 55; 60; 50; 55.

What is the ratio for the surface areas of rectangle prisims shown below given that they are similar and that the ratio of their edge lengths is 7: 3

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.

Multiplying an even number of negative numbers gives an answer that is choose from: