1. What is the velocity of a car that traveled a total of 87 km East in 2.5 hours? 2. What is the velocity of a plane that traveled 4700 miles from New York to California in 6.7 hr?

3. John took 38 minutes to bicycle to his grandmother's house, a total of 3.2 kilometers. What was his velocity in km/h?

you'd use the equation that establishes a relationship between  energy  and  wavelength, which looks like this

e=h⋅cλ, where

λ  - the wavelength of the photon; c  - the speed of light, usually given as  3⋅108m/s; h  -  planck's constant, equal to  6.626⋅10−34j s

plug the value you were given for the energy of the photon in the above equation to get the wavelength

e=h⋅cλ⇒λ=h⋅ce

λ=6.626⋅10−34js⋅3⋅108ms−1.257⋅10−24j=1.581⋅10−1m