Which capital letters in ISOSCELES produce the same letter after being rotated 180° in the plane of the page?

If there is no real number solution to the quadratic equation x^2+2x+c=0 what is a possible value of c? 1 -2 0 3

Write as a product: ac^2–ad+c^3–cd–bc^2+bd

The graph shows the decibel measure for sounds depending on how many times as intense they are as the threshold of sound. noise in a quiet room is 500 times as intense as the threshold of sound. what is the decibel measurement for the quiet room? 20 decibels28 decibels200 decibels280 decibels