3 of 20 (19 complete) 2.4.5
Given the following sets, find the set A' n (BUC).
U={1, 2, 3, 8}
A={1, 2, 3, 8}
B = {2, 4,5}
C={1,2,3,4,7
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
ту
ces
O A. A' (BUC')=(
(Use a comma to separate answers as needed. Use ascending order.)
OB. An (B. UC') is the empty set.

Grace is standing 18 feet from a lighthouse and kelly is standing 10 feet from grace. the angle that grace looks up to see the top of the lighthouse is 45°. the angle that kelly looks up to see the top of the lighthouse is y°. find the height, h, of the lighthouse. find the angle, rounded to the nearest tenth of a degree, in which kelly looks up to the top of the lighthouse. to the nearest tenth of a degree, find the value of x° . in two or more sentences, explain your calculations