Perform Each Computation, Keeping the Proper Number of Digits in Your

Short Answer

Perform each computation, keeping the proper number of digits in your answer.
(a) $\frac{\sqrt{39}+56.1}{49.5}$
(b) $(2.1)^{3}-(3.9)^{5}$
(c) $\frac{14^{2}}{9.0^{2}+5.0}$