5.) A recursive rule for a geometric sequence is:

a1=4/9; an = 3(an-1)

What is an iterative rule for this sequence?

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.