Can the mean ever be smaller than the smallest number in your data set

Jayda's house is located at (1, 5). she can walk in a straight line to get to cristian's house. a fast-food restaurant is located at (11, 0) and partitions the way from jayda's house to cristian's house by a ratio of 5: 1. find the coordinate of cristian's house. me . im a little stuck

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days

Which expression is rational? 6. , square root two, square root 14, square root 49