4. Express the following values in proper scientific notation. Be mindful to drop non-significant zeros when you express numbers in scientific notation a) 2310 m: b) 0.272 s c) 0.0031 days e) 513 000 hours e) 305 000 m/s. f) 0.00254 A_ 5. Calculate, expressing your answer in scientific notation. Make sure your final answer is rounded to the correct number of significant figures following the rules for addition/subtraction and multiplication/division as appropriate. Show all of your work in intermediate steps. a) (4.1 x 103 m) x (2.2 x 104 m) b) (1.53 x 105 m) / (2.1 x 107 s) c) 1.2 x 102 J - 4.1 x 101 ] d) (2.433 s + 1.213 x 10's) x (4.32 s)