Precipitation. Not enough precipitation falls on the ground that would allow trees to establish themselves successfully. Also, the rain that does fall tends to be evaporated into the atmosphere almost immediately, never really able to get deep into the soil. Plants that have fibrous root systems at the surface take advantage of this, and are able to thrive where trees would die.
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Factor trees are useful when you need to see the factors of a number. It is sometimes easier to see everything spread out.
He planted 10 trees in the shape of a 5 pointed star.If there were 5 trees in a row then 5 x 4 gives you the answer.
On an average an acre of corn transpires- 3000-4000 gallons a day and a tree can transpire 40000 gallons per year, amounting to approximately 110 gallons a day. Transpiration varies for different types of plants and trees. There are various factors that effect transpiration like weather, type of tree, wind, humidity etc.
He will plant 67 rows. 68 rows at 125 a row would be more than 8450.
Assuming that all the cedar trees are the same and that the three apple trees are the same, and it doesn't matter which of the apple trees you purchase, then you have the following options: CCCCAAA, CCCCAA, CCCCA, CCCC, CCCAAA, CCCAA, CCCA, CCC, CCAAA, CCAA, CCA, CC, CAAA, CAA, CA, C, AAA, AA or A. This is 19 possibilities. Because the problem says that you buy trees, the null set (i.e., not buying anyting) is not as option.