A toy store chain is growing very fast. During the first year it sells m million dollars of merchandise. Each year thereafter, it sells three times the previous year's sales. After 5 years of fast growth, it has sales of 162 million dollars. What is the value of m?

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.