Four Waves Are Described by the Following Expressions, Where Distances

question 52

Multiple Choice

Four waves are described by the following expressions, where distances are measured in meters and times in seconds. I y = 0.12 cos(3x - 21t)
II y = 0.15 sin(6x + 42t)
III y = 0.13 cos(6x + 21t)
IV y = -0.23 sin(3x - 42t)
Which of these waves travel in the +x direction?

• A) I and II
• B) I and III
• C) II and IV
• D) I and IV
• E) II and III

---

Definitions:

Multiple-Step Income Statement

This financial statement format separates operating from non-operating activities, providing a detailed breakdown of revenues, expenses, and net income.

Income from Operations

The profit generated from a company's regular business operations, excluding any extraordinary items.

Estimated Returns Inventory

Inventory that is reserved or set aside by a company, based on historical data, to account for future product returns from customers.

Physical Inventory

The process of counting the actual items in stock to verify records and ensure accuracy in inventory levels.