Loghan and kyle wanted to see if the type of ice cream in the freezer affects how hard or soft it is. at three different times, they placed one carton of different types of ice cream in the same location in the freezer. they made sure that the freezer temperature was the same each time. they also made sure that the freezer door remained closed after each carton was placed inside it. identify and explain one weakness in their experimental design.

An airplane travels from st. louis to portland, oregon in 4.33 hours. if the distance traveled is 2,742 kilometers. what is the airplane's average speed? - the airplane returns to st. louis by the same route. because the prevailing winds push the airplane along, the return trip takes only 3.75 hours. what is the average speed for this trip? - the airplane refuels in st. louis and continues on to boston. it travels at an average speed of 610 km/h. if the trip takes 3.75 hours. what is the flight distance between st. louis and boston?