The graph of
is given by,
Here given the function is 
when
, then it passes through the origin (0,0).
When 
Since we know that,
, then the function has maximum height at
.
Again when
, again the function is 0.
So clearly the function is the Oscillating function.
Using graphing calculator we get the graph of function
,
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namely, what is 1/2 of 3/4, well, is just their product.

The answer is 1.52 to your question.
Answer:
20 minutes
Step-by-step explanation:
x is 0 in the graph and y is 20
so 20 is your answer if 0 is x