marginal price and revenue

1

The revenue from a companys

socks is a function of the price they charge. The price

they can charge is a function of demand. Currently the

demand is dropping at a rate of 1000 ringtones per day.

The marginal price (as a function of demand) currently is

$.00001 per extra ringtone demanded .

What is the current marginal price as a function

of time?

2

if the current price of socks is $1.13 and the

current demand is 5000 socks, then

what is the current marginal revenue as a

function of time?