The graph of the function f(x) = −3x2 − 3x + 6 is shown. Which statements describe the graph? Select three options. On a coordin
2 answers:
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Part 1: The speed of the boat traveling downstream is miles per hr.
The speed of the boat traveling upstream is miles per hr.
Part 2: The speed of the current is 4 miles per hour.
Explanation:
Part (1): The motorboat travels 18 miles per hour in still.
Let w represents the speed of the current.
When the boat travels downstream, the speed of the current will get added to the speed of the boat.
Thus, the expression can be written as miles per hr
Hence, the speed of the boat traveling downstream is miles per hr.
When the boat travels upstream, the speed of the current will get subtracted to the speed of the boat.
Thus, the expression can be written as miles per hr.
Hence, the speed of the boat traveling upstream is miles per hr.
Part (2): The boat travels 49 miles upstream in the same time it takes to travel 77 miles downstream.
The distance formula is given by
Substituting, we have,
---------------(1)
---------------(2)
Solving using elimination method,
Dividing both sides by 36, we have,
Substituting in
, we get,
Thus, the speed of the current is miles per hour.
Answer:
The minimum amount of water to fill the sphere is
Step-by-step explanation:
we know that
The volume of the sphere (glass sphere) is equal to
we have
----> the radius is half the diameter
assume
substitute