Quadrilateral ABCD is rotated 55° about point R to create quadrilateral A'B'C'D'. What is the length of C’D’

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

In the figure below, segment ac is congruent to segment ab: triangle abc with a segment joining vertex a to point d on side bc. side ab is congruent to side ac which statement is used to prove that angle abd is congruent to angle acd? segment ad bisects angle cab. triangle acd is similar to triangle abd. segment ad is congruent to segment ac. angle cab is congruent to angle cba.

Rewrite 9 log, x2 in a form that does not use exponents. 9log, x = log, x