Amanufacturer claims that the calling range (in feet) of its 900-mhz cordless telephone is greater than that of its leading competitor. a sample of 18 phones from the manufacturer had a mean range of 1230 feet with a standard deviation of 38 feet. a sample of 12 similar phones from its competitor had a mean range of 1170 feet with a standard deviation of 36 feet. do the results support the manufacturer's claim? let μ1 be the true mean range of the manufacturer's cordless telephone and μ2 be the true mean range of the competitor's cordless telephone. use a significance level of α=0.05for the test. assume that the population variances are equal and that the two populations are normally distributed. step 2 of 4 : compute the value of the t test statistic. round your answer to three decimal places.

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.

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?

What is 140% of 25? because i need