Solve the problem.Suppose a rumor starts among 2 people in an office building. That is, y0 = 2. Suppose 400 people work in the building and 40 people have heard the rumor in 3 days. Write an equation for the number who have heard the rumor in t days. Assume that the rate of spread of the rumor satisfies the logistic equation: 
= k
y, where N is the size of the population and y is the number who have heard the rumor after t days.
A. y = 
B. y = 
C. y = 
D. y = 
Answer: A
Mathematics
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Add or subtract. Simplify the answer.
- 
A. 
B. 
C. 
D. 
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Find the center of mass of a thin plate covering the given region with the given density function.The region between the curve y = 
and the x-axis from x = 1 to x = 9, with density ?(x) = 
A. 
= 5, 
= 
B. 
= 5, 
= 
C. 
= 6, 
= 
D. 
= 5, 
= 
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Find the slope of the line.y = 3
A. m = 3 B. m = 0 C. m = 1 D. undefined slope
Mathematics