It takes Mrs. Rice 4 hours to drive the 240 miles to visit her sister in Plano. Calculate the rate to the nearest whole mile per hour for Mrs. Rice's drive.

Given:

Time = 4 hours

Distance = 240 miles

To find:

The speed or the rate mile per hour for Mrs. Rice's drive.

Solution:

We know that,

On substituting the given values, we get

Therefore, the speed or rate is 60 mile per hour for Mrs. Rice's drive.

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