Answer:

Explanation:
Given


Required
Determine the Net Primary Productivity (NPP)
NPP is calculated as follows;

Substitute values for GPP and R


<em>Hence, the Net Primary Productivity is </em>
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Answer:
The answer is ( x - 7)² + ( y - 8)² = 121
Hope this helps.
Answer:
a. longitudinal
Explanation:
A longitudinal study examines a given group over a long period of time, so collecting data from the same group of 30 people over their lifetime certainly fits that definition. It's more like an evolution study.
A cross-sectional compares different groups at the same point in time. So, it's more like a survey.
A microgenetic is much focused in time, providing multiple data sets in a short time to examine rapid evolution of a subject.
An experimental study design will make interactions and experiments with the study group, while this is not the case here apparently, and experimental is usually for a much shorter period than a generation.