The number of U. S. citizens aged 65 years and older from 1900 through 2050 is estimated to be growing at the rate of
R(t) = 0.063t2 − 0.48t + 3.87 (0 ≤ t ≤ 15)
million people/decade, where t is measured in decades, with t = 0 corresponding to 1900.† How many times faster will the average rate of growth of U. S. citizens aged 65 yr and older between 2000 and 2050 be than that between 1900 and 1950. (Round your answer to two decimal places.)

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

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