Consider the following numerical expression arising in a laboratory calculation:
P=(3.42×102)(5.7×10−4)(2.11×101)÷(6.3×10−2).
a) Evaluate P without rounding at any intermediate stage and write it in scientific notation.
b) Identify the number of significant figures permitted in the final answer on the basis of the given data.
c) Round the value of P obtained in part (a) to the correct number of significant figures and express it in standard scientific notation.