Exercise #2: quadrilateral defg has vertices at d(6,1), e (2,4), f (-5,4), and g(-1,1).
(a) graph defg and identify what type of quadrilateral it is.
(b) calculate the area of defg.
(c) calculate the perimeter of defg.
some figures may be subdivided into smaller regions so that common area formulas can be used
calculate the overall area.

Adecibel is a logarithmic unit that can be used to measure the intensity of a sound. the function y = 10logx gives the intensity of a sound in decibels, where x is the ratio of the intensity of the sound to a reference intensity. the reference intensity is generally set at the threshold of hearing. use the graphing utility to graph the decibel function. a whisper has a sound intensity of 30 decibels. use your graph to you complete the following statement. the sound intensity of a whisper is times the reference intensity.