In AWXY, the measure of ZY=90°, WY = 5, XW = 13, and YX = 12. What ratio represents the cosine of ZW?

If 1 is divided by the sum of y& 4.the result is equal to 3 divided by 4, find the value of m

The mean finish time was 185.52 with a standard deviation of 0.327 minute. the winning car driven by chris finished in 185.13. the previous year race had a mean finish time of 110.3 with a standard deviation of 0.106. the winning car that year driven by karen finished in 110.13 minutes. find their respective z-scores. chris - z-score karen “- z-score

Arace is 10 kilometers long.markers will be placed at the beginning and end of the race course and at each 500 meter mark.how many markers are needed to mark the course for the race?