Which of the following describes the number 0.5?

a.) Irrational, nonrepeating decimal
b.) Rational, terminating decimal
c.) Irrational, terminating decimal
d.) Rational, repeating decimal

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.