Answer:2.47
Explanation: did the math
China because it is cheaper then getting it from Pittsburgh
It is important to note that the electromagnetic spectrum has a variety of wavelength and frequency of light in it. Some lights we can see, while others are not visual to our naked eye. It is actually very important to determine the kind of light as different lights have different wavelengths and frequencies. some lights are of very high frequency like the gamma rays, while others are of far lower frequency. <span />
C. because the car traveled twice as long at the same rate as the truck
