According to the U. S. Census Bureau, about 24% of residents of the United States aged 25 years or older have completed at least 4 years of college. A sample of 8 people, aged 25 years or older, is selected at random. Find the probability that exactly 5 have completed at least 4 years of college.

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

the radius is 2 times the diameter.

step-by-step explanation:

(5x-1)^2= (5x)^2-2(5x)×1+(1)^2=25x^2-10x+1