contestada

The total cost formula is:
C=Q3−60Q2+1800Q+240
and the total revenue formula is:
R=1275Q
Find the formula of marginal value and revenue?
WHAT IS THE value OF Q AND P THAT WILL maximize PROFIT?
WHAT IS THE MARGINAL revenue IF Q=20?WILL THE PROFIT MAZIMIZING quality BE ?LESS THAN 20, greater than 20 OR EQUAL?