John lives on the side of a mountain and the elevation of his residence is 1025 feet above sea level. his brother lives in a deep valley that is 25 feet below sea level. what is the difference in altitude of the locations occupied by the two brothers?

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.