In the diagram, polygon abcd is flipped over a line of reflection to form a polygon with its vertices at a′, b′, c′, and d′. points a′, b′, and d′ are shown, but the line of reflection and point c′ are not.
the line of reflection is , and the coordinates of c′ are

When are two distinct non vertical lines parallel

Fiona races bmx around a circular dirt course. if the radius of the course is 70 meters, what is the total distance fiona covers in two laps of the race? a. about 30,772 meters b. about 15,386 meters c. about 879.2 meters d. about 439.6 meters e. about 219.8 meters23 points hurry

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.