Question 870658
a){{{P=10+40r-20r^2}}}
{{{P(0)=10}}}
10,000
b){{{r>=0}}}
c){{{dP/dr=40-40r}}}
d) Max occurs where {{{dP/dr=0}}}
{{{40-40r=0}}}
{{{40=40r}}}
{{{r=1}}}
{{{P=10+40-20}}}
{{{P=30}}}
30,000