Consider the table below that summarizes the types of materials that can block the 3 different types of radiation. Based on the table, at which numbered spot in the table does each type of radiation belong?
A) 1=beta;2=alpha;3=gamma
B)1=alpha;2=beta;3=gamma
C)1=beta;2=gamma;3=alpha
D) 1=gamma ;2=alpha;3=beta

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

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the independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.

the dependent variable, the one that you measure the response in, is the distance that the washers travel.