Final answer:
To find the marginal revenue when 30 units are sold, substitute x = 30 into the revenue formula. The marginal revenue when 30 units are sold is $2,841.
Step-by-step explanation:
To find the marginal revenue when 30 units are sold, we substitute x = 30 into the revenue formula.
R = 10(2x+1)−1+75x−18
R = 10(2(30)+1)−1+75(30)−18
R = 10(61)−1+2250−18
R = 610−1+2250−18
R = 610+2231
R = 2841
The marginal revenue when 30 units are sold is $2,841. This means that for each additional unit sold beyond 30 units, the revenue will increase by about $2,841.