Acar travels from a to b at a speed of 40 mph then returns, using the same road, from b to a at a speed of 60 mph. what is the average speed for the round trip?

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?

The fraction 7/9 is equivalent to a percent that is greater than 100%. truefalse

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