A 6 foot tall man cast a shadow that is 84 inches long. At the same time of the day, a tree next to the man cast a 38.5 foot shadow what is the height of the tree in feet?

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Kai walked one and two-thirds of a mile on saturday and four and one-sixth of a mile on sunday. how many miles did kai walk?

In a small section of a stadium there are 40 spectators watching a game between the cook islands and fiji. they all support at least one of the two teams. 25 spectators support the cook islands and 16 of these support both teams. how many support only fiji?