Find $(2+\sqrt{5} i)^{3}$ Using De Moivre's Theorem $-0.81+0.58 i$ B) $-22+15.65 i$ C) $0.18+0.98 i$

question 17

Multiple Choice

Find $(2+\sqrt{5} i) ^{3}$ using De Moivre's theorem.

• A) \(-0.81+0.58 i\)
• B) \(-22+15.65 i\)
• C) \(0.18+0.98 i\)
• D) \(0.54+2.95 i\)
• E) \(15.65-22 i\)

---

Definitions:

Average Daily Cost

The total cost associated with a process or product divided by the number of days in the period being considered.

Days' Sales

A financial metric, often calculated as days sales outstanding (DSO), that measures the average number of days it takes a company to collect payment after a sale has been made.

Retail Method

An inventory valuation method used by retailers that estimates inventory value by applying a cost to retail price ratio.

Estimated Cost

An approximation of the cost for goods or services, projected based on current information and past experience.