For a large hotel construction job, a group of 11 workers completed 33 rooms in four weeks. If the company has to complete 57 rooms in the next four weeks, and the workers work at the same rate, how many workers are needed?

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

i do not know the answer

step-by-step explanation:

it would open into a square depending on the type of envelope i’m not sure about the second part