Question

The total revenue received from the sale of ‘x’ units of a product is R(x) = 36x + 3x² + 5. Then, the actual revenue for selling the 10^th item will be:

Options

• 27

• 90

• 93

• 33

Answer 1

93

Explanation:

Revenue R(x) = 36x + 3x² + 5

R(10) = 36 × 10 + 3(10)² + 5

= 360 + 300 + 5

R(10) = 665

R(9) = 36 × 9 + 3(9)² + 5

= 324 + 243 + 5

R(9) = 572

The actual revenue for selling the 10^th item

= R(10) – R(9)

= 665 – 572

= 93

The actual revenue for selling the 10^th item will be 93.