34. using a centimeter rule having 1-mm scale divisions, you find the sides of a rectangular piece of plywood to be 3.54 cm and 4.85 cm. the calculated area is 17.1690 cm2. in significant figures the results is correctly expressed as; a) 17.0 cm2, b) 17.2 cm2, c) 17.17 cm2, d) 17.169 cm2.