Evaluate the Improper Integral $$\int _ { 0 } ^ { 9 } \frac { d x } { \sqrt { 81 - x ^ { 2 } } }$$

question 196

Multiple Choice

Evaluate the improper integral.
- $$\int _ { 0 } ^ { 9 } \frac { d x } { \sqrt { 81 - x ^ { 2 } } }$$

• A) 18
• B) \(\frac { \pi } { 18 }\)
• C) 1
• D) \(\frac { \pi } { 2 }\)

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