At Time T = 0, a Seed Is Planted $f ( t ) = 0.3 t ^ { 2 } + 0.6 t + 0.5$

question 145

Multiple Choice

At time t = 0, a seed is planted. After t weeks, the height of the plant is given by $f ( t ) = 0.3 t ^ { 2 } + 0.6 t + 0.5$ inches. At what rate is the plant growing after 8 weeks?

• A) 5.4 inches/week
• B) 10.1 inches/week
• C) 0.6t + 0.6 inches/week
• D) 24.5 inches/week
• E) none of these

---

Definitions:

Demand

The desire and ability of consumers to purchase goods and services at given prices.

Perfectly Elastic

Describes a situation in economics where the demand or supply for a product can vary infinitely with a small change in price.

Inelastic

A situation in which the demand for a product does not increase or decrease correspondingly with a fall or rise in its price.

Perfectly Elastic

Describes a situation where the quantity demanded or supplied changes infinitely in response to any change in price.