Which of the following is a perfect square?

a. 115
b. 279
c. 169
d. 154

What is the vertical asymptotes of the function f(x)=x-2/x*2-3x-4

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2