Which is the product of these numbers, to the appropriate number of significant digits? 56.2 x 9.2057 =

A. 517.00
B. 517
C. 517.36
D. 517.4

Use the de broglie's wave equation to find the wavelength of an electron moving at 4.5 × 106 m/s. show your work. note: h= plank's constant (6.62607 x 10-34 j s)