Question

which unit would you use to measure how long it takes for a runner to complete a 50 meter dash? seconds kilograms moles meters

Explanation:

To determine the unit for measuring the time a runner takes to complete a 50 - meter dash, we analyze each option:

• "kilograms" is a unit of mass, so it can't be used to measure time.
• "moles" is a unit used in chemistry to measure the amount of a substance, not time.
• "meters" is a unit of length, not time.
• "seconds" is a unit of time, and it is appropriate for measuring the duration of a short - term event like a 50 - meter dash.

Answer:

A. seconds