In a recent year, 34.1% of all registered doctors were female. If there were 51,300 female registered doctors that year, what was the total number of registered doctors?
Round your answer to the nearest whole number.

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.