If a hummingbird's wings beat at 12 inches per second then how long will it take them to move 6 feet?

Step One

Convert 6 feet to inches

1 foot = 12 inches.

6 feet = x inches           Cross multiply

1*x = 6 * 12

x = 72 inches

Step Two

Find out how long it will take to get the bird's wings to move a distance of 72 inches.

1 second = 12 inches.

x seconds = 72 inches          Cross multiply

12*x = 1 * 72

12x = 72                                  Divide by 12

x = 72/12

x = 6

Solution

It will take all of 6 seconds for the hummingbird to get their wings moving to 6 feet.  

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answer: d.) the total number of protons and neutrons is 15

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