Standard+2.7d-lm

Standard 2.7.D: Rational Equations and Functions
Model a situation that can be discribe by a Ration Function and use the model to answer questions about the situation.

Example Problems for Standard 2.7 D
SA=2piRH+2piR2 If the surface area of the closed cylinder is 25 square inches, write an equation that represents the height of the cylinder in terms of R?

25=2piRH+2piR2 __-2piR2 -2piR2__ 25-2piR2=2piRH

__25-2pi2__ 2piR=H

Problem 1
The intensity ,L, of light varies inversely with the square of the distance ,R, from the source of the light given that K is the constant of proportionality, write an equation that describe this relationship.

L= __K__ R2