Question 1a) In this question, you should use the algorithm format for Boolean e

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Question 1a) In this question, you should use the algorithm format for Boolean expressions. Keep in mind the difference between a Boolean expression, and a test used in a branch or loop. You need only to write the expression (example: A = (B + 3) ), and not a branch structure.



The Boolean expressions that you write for this question should use only the comparison operators (<, >, =, etc.), Boolean operators (AND, OR, NOT), and math operators +, –, ×, /, or MOD. Use parentheses where necessary. Do not use Java syntax!



Suppose that a variable L is true if an aircraft is in level flight, and false if the plane is in a landing or climbing phase. The landing gear should be lowered when both of the following conditions apply:

The aircraft is not in level flight and the aircraft speed S is less than 300, or the plane is in level flight and the speed is less than 200.
The altitude A of the aircraft is less than 1000; or if the altitude is less than 2000 and the speed of the plane S is less than 250.

Write a Boolean expression that is true if the aircraft landing gear should be lowered and false otherwise.

Explanation / Answer

((NOT L) AND (S < 300)) OR (L AND (S < 200)) AND ((A < 1000) OR ((A < 2000) AND (S < 250)))

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