4) solve the following problems

P. Perform each of the following calculations. Round off your answers to two digits

a)\( 1 \over 3.40 × 10^{24 }\) ;

b)\(33\over 9.00 × 10^{-4}\) ;

c) \(1.4 × 10^9\over (2.77 × 10^3 ) (3.76 × 10^5 )\);

d)\((4 × 10^{-3}) (9.9 × 10^{-7})\over (789) (1.002 × 10^{-10}\space) (0.3 × 10^2 ) \)