Express 0.54 as a fraction in simplest form as a percent

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.

Aof 12 , we to a of 4 to on a .of 4 be ?

Find a third-degree polynomial equation with rational coefficients that has roots -2 and 6+i