Blake and Camille both run regularly.
Let B(D) be the amount of time, in seconds, that it takes Blake to run D meters.
Let C(D) be the amount of time, in seconds, that it takes Camille to run D meters.
Assume that B(D) and C(D) are both invertible.
For each of the following, give a mathematical expression for the indicted quantity (possibly involving B and/or C):
a. The amount of time it takes Camille to run the same distance that Blake runs in 450 seconds is
b. The amount of time, in seconds, it takes Blake to run 400 meters is