A. A car travels 20 m/s and reached its destination in a record time of 10 secs. Calculate the distance travelled by the car.​

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?