To find the distance across a river, a surveyor selects two reference points, A and B, w...

To find the distance across a river, a surveyor selects two reference points, A and B, which are 300 feet apart on the same side of the river. The surveyor then selects a third reference point, C, on the opposite side of the river and determines the angles as shown in the figure. Approximate the distance from A to C.