A Boy Wishes to Cross a River in the Shortest $\theta$

question 55

Multiple Choice

A boy wishes to cross a river in the shortest possible time, without necessarily landing directly across from his starting point.He can row at 2 m/s in still water and the river is flowing at 1 m/s.At what angle $\theta$ should he point the bow (front) of his boat?

• A)30 °
• B)45 °
• C)60 °
• D)63 °
• E)90 °

Describe the roles and experiences of African Americans and other minority groups in early 20th-century America.

Identify and explain the causes and effects of major strikes and labor movements in the early 20th century.

Understand the significance of major legal and legislative changes in the United States during and after World War I.

Analyze the effects of World War I on American foreign and domestic policy.

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Definitions:

Contribution Margin Ratio

A financial metric that measures how much of a company's revenue is available to cover its variable costs and contribute to its fixed costs and profits.

Fixed Costs

Expenses that do not change with the level of goods or services produced by the business, such as rent, salaries, and insurance premiums.

Break-even Point

The point at which total income matches total outgoings, leading to neither a profit nor a loss.

Sales Dollars

This term represents the total revenue generated from the sales of goods or services, expressed in currency units.