9514 1404 393
Answer:
25/42 mi
Step-by-step explanation:
5/6 of 5/7 of a mile is ...
(5/6)(5/7 mi) = 25/42 mi
According to his calculations, b has a 3/10 chance to win
Draw a triangle with shortest side on the ground (horiz.). The length of this side is 80 feet. Two angles touch the ground: a right angle, and the 70 degree angle.
Then the height of the building is the 2nd shortest side.
The tangent function is the appropriate one to use here:
opp h
tan 70 deg = -------- = ----------
adj 80 ft
h
Since tan 70 deg = 2.75, 2.75 = -------
80 ft
so h = building height = (80 ft)(2.75) = 219.8 ft
