Two points in a sphere are 777m apart and the distances of a lighthouse from these points are

650m and 525m. the lighthouse radiates a narrow beam which revolves at a uniform rate,

making one complete revolution in 15 seconds. find the time taken for the beam to traverse the

strip of shore between the points

Do social recommendations increase ad effectiveness? a study of online video viewers compared viewers who arrived at an advertising video for a particular brand by following a social media recommendation link to viewers who arrived at the same video by web browsing. data were collected on whether the viewer could correctly recall the brand being advertised after seeing the video. the results are given below. correctly recalled the brandarrival 409153browsing20484b. conduct the hypothesis test, using the 0.025 level of significance. what is the value of the test statistic? χ2stat=what is the p-value? p-value=is this value significant atα=0.025?

Sketch one cycle if the cosine function y=2cos2theta

Which number completes the system of linear inequalities represented by the graph? y> 2x – 2 and x + 4y 2 et 2 3 4