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29.08.2019 •
Mathematics
Afood packet is dropped from a helicopter and is modeled by the function f(x) = -12x2 + 19200. the graph below shows the height f(x), in feet, of the food packet at different times x, in seconds:
use the graph to determine the reasonable domain of f(x) based on the context.
all real numbers
x ≤ 19200
-40 ≤ x ≤ 40
0 ≤ x ≤ 40
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Ответ:
When the food package is on the plane, we have that the height of the package is given by:
Rewriting we have:
When, time passes, the height decreases.
When the time is 40 seconds (x = 40) the package reaches the ground and the height is 0.
Therefore, a reasonable domain for the function is:
0 ≤ x ≤ 40
0 ≤ x ≤ 40
Ответ:
c
Step-by-step explanation: