for decomposition of two drugs, A and B are given in the table below : Time (hours) Drug A (mg) Drug B (mg) 0.5 379 181.2 1.0 358 164.0 1.5 337 148.6 2.0 316 134.6 3.0 274 110.4 4.0 232 90 6 6.0 148 61.0 8.0 64 41.0 a. Determine (by plotting or otherwise) the rate of decomposition of both drugs.

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Units and Dimensions

Dimensions are the basic concepts of the measurement of quantities. Units are the means of expressing the dimensions. For instance, an area has a dimension of L2 and a unit of m2.