Scarlett sells designer ponchos. The revenue, R, she makes from selling a batch of n ponchos is given by the function R(n)=20, and the expenses, E, that she incurs from producing a batch of n ponchos is given by the function E(n)=10 times the square root of n.

Let P be the total profit Scarlett makes from producing and selling a batch of n ponchos.

Write a formula for P(n) in terms of R(n) and E(n)

Write a formula for P(n) in terms of n.