Two buses are traveling to a state park. one bus leaves the terminal at 4: 00 p. m. and travels at 40 miles per hour. the second bus leaves the terminal at 5: 00 p. m. and travels at 60 miles per hour. how much time passes until the second bus catches up with the first bus?

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step-by-step explanation:

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