Fifty measurements are taken of the octane rating for a particular type of gasoline. The sample mean rating (in percent) was 85.8 and the sample standard deviation was 1.2. What is our estimate of the mean.

Amotorboat maintained a constant speed of 12 miles per hour relative to the water in going 45 miles upstream and then returning. the total time for the trip was 8.0 hours. use this information to find the speed of the current.

A. 120 degrees b. 90 degrees c. 30 degrees d. 60 degrees

Ahummingbird lives in a nest that is 15 feet high in a tree.the hummingbird flies 17 feet to get from its nest to a flower on the ground.how far is the flower from the base of the tree?