Find the Surface Area or Volume $y = \cos x , 0 \leq x \leq \frac { \pi } { 2 }$

question 255

Multiple Choice

Find the surface area or volume.
-Use numerical integration with a programmable calculator or a CAS to find, to two decimal places, the area of the surface generated by revolving the curve $y = \cos x , 0 \leq x \leq \frac { \pi } { 2 }$ , about the $x$ -axis.

• A) 14.42
• B) 2.29
• C) 1.15
• D) 7.21

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Definitions:

Debt-to-equity Ratio

A financial indicator showing how much of a company's assets are financed by debt compared to shareholders' equity.

Receivable Turnover

A financial ratio that measures how efficiently a company collects its outstanding credit sales, typically calculated annually.

Inventory Turnover

A ratio showing how many times a company's inventory is sold and replaced over a period, indicating efficiency in managing and selling stock.

Acid-test Ratio

A stringent test that measures the liquidity of a company by comparing its most liquid assets (excluding inventory) against its short-term liabilities.