Which unit would you use to measure the length of a football field mm cm m or km?

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Eliza wants to make $10,000 from her investments. she finds an investment account that earns 4.5% interest. she decides to deposit $2,500 into an account. how much money will be in her account after 14 years?