Can someone help me.

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33

Acourt reporter is transcribing an accident report from germany. the report states that the driver was traveling 80 kilometers per hour. how many miles per hour was the driver traveling?