Jamie's father has to build a corral for her new pony. The plan shows the length of the sides of the corral. Jamie's father says that the fence posts must be ten feet apart

16

Step-by-step explanation:

The post must be 10 feet apart, the width of the corral is 50 feet and the length is 30 feet.

Each width sides get 6 posts and the length get 2 posts each.

therefore the total number of posts needed for the corral is;

    = perimeter of a rectangle

   = 2 ( l + w) / 10 feet apart

   = 2 ( 50 + 30) / 10

   = 160/10

   = 16 posts

-2x-4

step-by-step explanation:

38 was the other number of your question.