Prof. S. Brick Math 202
Fall ’03 section 102
Math for Elem Ed II; Quiz 2
Show your work and explain your reasoning. closed book and closed notes.
0. Print your name:
1. The speed of sound is approximately 760 mph. Assuming that a lightning flash takes
no appreciable time to be seen and that the thunder is heard tseconds later, explain the
algebra behind the formula d=t/5 where dis the approximate distance in miles to the
lightning strike.
2. The new temperature scale “Mobileheit2” is related to that of Fahrenheit in the following
ways: the relationshp is linear; 100◦Fis 70◦Mand 30◦Mis 20◦F. Find a function whose
input is in ◦Fand whose output is ◦M.
3. Find the equation of the line through (4,3) and parallel to 1800 = 2y+ (√5·x). Do
not use a calculator.