A smart phone manufacturer wants to determine the average battery time that it’s new smart phone will get. The manufacturer will test 100 smart phones. Match the strategy to their corresponding sampling techniques

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

Mr. vector door is buying two new cowboy hats all together the hats cost $75.12 the second heart cost twice as much as the first hat what is the price of the more expensive at round to the nearest hundredth

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