just realized this is an old question
<span>A dragonfly beats its wings about 30 times a second. This is necessary to allow the insect to keep itself airborne, due to the relative weight of its body. Luckily, dragonflies have two sets of wings, or they would have to work even harder to stay up in the air.</span>
Answer:
the answer I got is 6 (x+14)
Volume of the orange juice in the carton = 10*6*8 = 480 cm^3
when its turned on its side we have the equation 6*20*h = 480 where h = required height
h = 480 / (6*20) = 480 / 120 = 4 cms
answer = 4 cm
