Question

Given that the mass, m g, of a sphere is directly
proportional to the cube of its radius, r сm, copy
and complete the table.
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Answer 1

Given that the mass, mg, of a sphere is directly proportional to the cube of its radius, r сm, copy and complete the table. 0.2 0.7 1.5 6.75 0.25 11.664 -hen 9. 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. (1) 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? 10. If y is directly proportional to x and the difference in the values of y when x = 1 and x = 3 is 32, find the value of y when x = -2. DANCED LEVEL