Answer:
C
Step-by-step explanation:
The number of people who have heard a rumor is modeled by the logistic function:
And we want how many days has passed since the rate at which the rumor spread began to decrease.
First, the numerator tells us that the total number of people who will have heard the rumor by the end is 260.
Recall that the point of maximum growth is always half of the maximum capacity.
In this case, that point will be 260/2 = 130.
For a logistic function, the rate of all values to the left of the halfway point is increasing, (i.e. concave up), while the rate of all values to the right is decreasing (i.e. concave down). Therefore, we can solve for x when f(x) = 130:
Cross-multiply:
Distribute:
Solving for x:
Therefore:
Taking the natural log of both sides:
Therefore:
After about 52.3 days, the rate at which the rumor started spreading will begin to decrease.
Answer :
I inserted a photo hope it helps :)
Answer:
This study will be identified as : exempt review
Step-by-step explanation:
A student is conducting a research project that involves using a survey. The survey asks subjects about their political affiliation and their favorite politicians.
No identifiable information will be collected.
This study will be identified as : exempt review
To qualify for a review at the exempt level, the research should be less than the minimal risk defined.
Answer:
This would be the range, the interquartile range, the variance, and finally the standard deviation.
Step-by-step explanation:
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