A city store operates from 8am to 6pm and charges the following rates ...

1 A city store operates from 8am to 6pm and charges the following rates a. $2 for up to 2 hours b. $3 for each hour or part of an hour in excess of 2 hours c. a maximum charge of $17 sketch the graph of the parking charges against time. Give the domain and range of the function represented. 

2 when a radar is used on a highway to determine the speed of a car, a radar beam is sent out and reflected from a moving car. The difference F (in cycles per second) in frequency between the original and reflected beams is given by F= vf/540. where v is the speed of the car, and f is the frequency of the original beam(in megacycles per second). suppose you are driving on the highway with a speed limit 90 km/h. a police officer aims a radar beam with a frequency of 2450(megacycles/sec) at your car, and the officer observes the difference in frequency to be 420(cycles/sec). can the officer claim you were speeding?