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Q5. The intensity of radiation, R, from certain radioactive materials at a particular time, t, is considered to follow the law:

R = ktⁿ where k and n are constants.

A test produced the values shown in Table Q5.

(a) Using the values in Table Q5, draw a graph to verify the law. (10)

Suggested scale:         horizontal axis 2 cm = 0.1

vertical axis 2 cm = 0.1

(b) Use the graph drawn in Q5(a) to determine approximate values for k and n. (6)