Answer: 3 x 10^16
Explanation:
you get the answer by dividing the energy by plancks constant, so f=E/h with e being the energy and h being plancks constant. so 2.0 x 10^-17/ 6.626 x 10^-34=3.01841231 x 10^16 and when rounded it would give u the answer 3 x 10^16
