In the united states, unwise land-use practices lead to annual losses of topsoil by wind and water totaling

4 Billion Metric tons

Explanation:

Mismanagement of arable land is a major factor that leads to the loss of top fertile soil layer that can support the growth and development of crop plants. The studies have reported that unwise land-use practices lead to annual losses of topsoil by wind and water totaling 4 Billion Metric tons.

Therefore, there is alot of focus now adays on conservation of soil and arable land that can also prevent soil erosion and help in growth of more crops and increase agricultural productivity.

Studies have also reported that proper management practices of soil can help in lowering the soil erosion by 100 to 5 tonnes/ hectare/year.

In the promotion of this efforts, during 1930s there were  220 million trees  planted in United States as a strategy to lower soil erosion due to water and wind.

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answer-

the statement that f(x) = |x+a| + b has exactly one x-intercept is sometimes correct.

solution-

it solely depends on b, whether the function will have one or two or zero x intercept.

this plot of the given function, f(x) = |x+a| + b will be the basic absolute value graph i.e v shape, with vertex translated to (-a, b), instead of origin.

1-   if b is zero, the graph will have exactly one x-intercept, at x= -a

2- if b is positive, the whole graph will be above the x-axis, hence it will have no x-intercepts.

3- if b is negative, the graph will be below the x-axis, hence it will have two x-intercepts.

∴ the statement is sometimes true.

where are there choices to this question?