Equations+and+Inequalities-Target+B-Solving+for+What?-Extended+Problems

Target B: To Solve Literal Equations
1. Carl says that the following equations are two ways to write the same formula. Do you agree or disagree with Carl? Explain your answer.

math c=\dfrac{s}{s+1} math

math d=\dfrac{c}{c-1} math

2. Was your answer different from Eisen's fastest speed? What could account for the difference?
 * Slow Forty follow-up questions: **

3. According to the World Almanac of Books and Facts, a cheetah can run at a top speed of 70 miles per hour. How long would it take the cheetah running at this speed to finish the 40-yard dash?