Use the balanced scale to find the conversion factor that can be used to convert the number of blocks to the weight of the blocks in pounds. Help no steal or I will find you and post you to the public

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.