1.74. Perform each of the following calculations, and
express the answer with the correct number of
significant figures:
a. $[(12 \times 60.0) + 55.3]/(5.000 \times 10^3) =$
b. $3.1416 \times (2.031)^2 \times 3.75 \times 8.00 =$
c. The number of cubic centimeters in 389 cubic
inches
d. The average (mean) of 8.7, 8.5, 8.5, 8.9, and 8.8