Which relation is a function?
1 answer:
Answer:
The vertical parabola(see attachment)
Step-by-step explanation:
The relation that is a function must pass the vertical line test.
The vertical parabola will pass the vertical line test.
This means that, a vertical line drawn across the entire graph will intersect the vertical parabola at only one point.
The horizontal parabola, the circle and the vertical line will not pass the vertical line test.
This means that, a vertical line drawn across the entire graph will intersect the graph of these functions at more than one point.
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The formula for the surface area of a cylinder is , where r stands for the radius of the base of the cylinder, and h stands for the cylinder's height.
Answer:
The speed is 20.8 m/s
Step-by-step explanation:
If a projectile ascends vertically, and after 3 seconds it reaches its maximum height, calculate the velocity that it carries to the middle of its downward trajectory
Let the maximum height is h and initial velocity is u.
From first equation of motion
v = u + at
0 = u - g x 3
u = 3 g.....(1)
Use third equation of motion
Let the speed at half the height is v'.