Temperatures in June in LA are distributed nearly normally with mean 77 degrees and standard deviation 5 degrees F. which of the following temperatures would be considered unusual? A)73
B)80
C)69
D)65
E)86

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq