Help please you will get 20 points

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

The clayton family’s pool has vertices at the coordinates (0, 2), (0, 5), (2, 5), (2, 6), (5, 6), (5, 1), (2, 1), and (2, 2). if each grid square has an area of 9 square feet, what is the area of the pool?

Choose the more precise measurement. 26.4 cm or 8.39 cm