Which choice shows the coordinates of C' if the trapezoid is reflected across the y axis? Help pls

Given w
you know the value of the height of the wall, and the distance between the foot of the ladder from the wall, you can conveniently find the length of the ladder...
using the Pythagorean theorem
the length therefore equals
√[(height of wall) ² + (distance of ladder from wall) ²]
= √[ 8² + 12²]
= √64+144 = √208
≈14.42 ft

this is a real life application of the Pythagorean theorem