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A ruby-throated hummingbird beats its wings about 53 times each second. About how many times does a ruby-throated hummingbird beat…
A ruby-throated hummingbird beats its wings about 53 times each second. About how many times does a ruby-throated hummingbird beat its wings in 5 seconds?
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admin2020-08-06 20:03:362020-08-06 20:03:36A ruby-throated hummingbird beats its wings about 53 times each second. About how many times does a ruby-throated hummingbird beat…