Answer:
15.
Step-by-step explanation:
15 is composite because 3 * 5 = 15.
The others are prime.
Answer: rational
a rational number is a number that can be expressed by a quotient or a fraction
The propeller-driven airplane has over the jet is that maximum thrust is ... efficiency at the higher altitudes is lost (turbofan engines are ... pilot is worse off than the propeller pilot. For ... applicable speed limit at all times.
Answer:

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