Explain why if a runner completes a 6.2â-mi race in 32 âmin, then he must have been running at exactly 11 âmi/hr at least twice
1 answer:
Answer:
Accelerating to top speed, deaccelerating to finish line.
Step-by-step explanation:
If the runner kept a constant speed of 11 mph for the whole duration of his run (32 minutes), the distance he would have covered is:
This means that, in order to run the full 6.2 miles, the runner needs to reach a speed over 11 mph. Assume he starts from rest, while accelerating the runner reaches, and the surpasses, the 11 mph mark. Since his speed at the finish line is zero, the runner has to deaccelerate from his current running speed (which should be higher than 11 mph), passing through 11 mph and reaching zero at the finish line.
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ANSWER
The function that the given graph corresponds to is
EXPLANATION
The given graph in the attachment has x-intercepts at
These are the solutions of the polynomial function represented by the given graph.
We can write all these solutions as factors to obtain,
The product of all these factors gives us the function whose graph was drawn.
This implies that,
Therefore the correct answer is option C.
The function that the given graph corresponds to is
EXPLANATION
The given graph in the attachment has x-intercepts at
These are the solutions of the polynomial function represented by the given graph.
We can write all these solutions as factors to obtain,
The product of all these factors gives us the function whose graph was drawn.
This implies that,
Therefore the correct answer is option C.