305 to the nearest ten

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

Suppose the radius of a circle is 16. what issuppose the radius of a circle is 16. what is its circumference its circumference

Can someone explain to me how to do