The regression equation ŷ = 305x +41,987 models Mrs. Smith's yearly
salary x years after she was hired. Which choice represents the number of years
after Mrs. Smith was hired when she was most likely to have a salary of $45,378?

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.