During a certain period in the life of an earthworm, its length, L cm, is directly proportional to the square root of N, where N is the number of hours after its birth. One hour after an earthworm is born, its length is 2.5 cm. (i) Find an equation connecting L and N. (ii) Find the length of an earthworm 4 hours after its birth. (iii) How long will it take for an earthworm to grow to a length of 15 cm? PLEASE GIVE ANSWER OF ALL PART.
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Answer:
(i) L² = N
(ii) 2.5 × 4 = 10
(iii) 6 hours
15/2.5 = 150/25 = 6
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