The amount of money student council can spend on food per student
=(2000-150-3.5×225)÷225
≈$4.72(It's a recurring decimal) or $85/18
Answer:
Water erosion is the wearing away of the soil surface by water from rain, runoff, snowmelt, and irrigation. ... Water erosion occurs in all soils to varying degrees. Slight erosion is actually beneficial to the formation of soil but severe or accelerated erosion adversely affects soil and environment.
Source: SpringerLink
hope this helps!
Answer:
A rock with a half-life of 5,280 years having 1/8th of the parent material left will be 15,840 years old.
Explanation:
The half-life of a material is the time needed for only half of the parent material to be left, while half has is gone, or rather has disintegrated. The half-life is used further into the falling apart of the parent material though, with the same principle being applied. Practically, from the 1/2 of the parent material being left, the half-life of it would mean 1/4 of the parent material being left, and from that 1/4, the half-life would be at 1/8 of the parent material being left, and so one, by simply dividing in two.
In this case, having a half-life of the rock of 5,280 years, we will simply need to add that amount of years on every next phase. So, the half-life is 5,280 when 1/ of the parent material is left. When 1/4 of the parent material will be left we will have an age of 10,560 years, while when only 1/8 is left, we will have 15,840 years of age for the rock.
They had to cross the Himalayas, Karakorum, and Kunlun mountain ranges