An oak tree is 60 feet tall and casts a 40-foot shadow. what is the approximate distance from the top of the oak tree to the top its shadow?

20 feet
72 feet
100 feet

168

step-by-step explanation:

i am pretty sure that the answer is 168

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92