Final answer:
The contract between Miranda Airways and Wurtherton, Inc. is a bilateral contract, where both parties have agreed to the terms.
Step-by-step explanation:
The nature of the contract between Miranda Airways and Wurtherton, Inc. is a bilateral contract, which is formed when both parties exchange promises and have a mutual agreement on the terms.
In this case, Miranda Airways made an offer to purchase a plane from Wurtherton, and First Global Bank issued a document to Wurtherton to guarantee the payment if Miranda fails to pay. Wurtherton accepted the offer, but with additional terms allowing Miranda to use the plane for 10 years before returning it. Miranda agreed to the acceptance, and Wurtherton delivered the plane.
Therefore, the contract is a legally binding agreement between Miranda Airways and Wurtherton, with both parties having obligations and rights under the terms of the contract.