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(a) What Is the area and uncertainty in area of one side of a rectangular plastic brick that has a length of (21.4 + 0.4) cm and a width
of (9.8 0.1) cm? (Give your answers in cm².)
209.72
X
6.06
x) cm²
(b) What If? If the thickness of the brick is (1.2 ± 0.1) cm, what is the volume of the brick and the uncertainty in this volume? (Give
your answers in cm³.)
1.73
X 0.432
x) cm³

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