Final answer:
First gear in a vehicle with a manual transmission is typically used for low speeds and starting from a complete stop, with a maximum speed around 10-20 miles per hour (16-32 kilometers per hour).
Step-by-step explanation:
In a vehicle with a manual transmission, first gear is typically used for low speeds and starting from a complete stop. It provides the most torque and power but has a lower top speed compared to higher gears. The maximum speed for first gear varies depending on the vehicle, but it is generally around 10-20 miles per hour (16-32 kilometers per hour).