Solve the problem.
= 21
A. 2.2455
B. 2.277
C. 2.3067
D. 1.4248
Answer: A
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Solve the problem.The spread of a cold virus can be modeled using logistic equations. The key assumption is that at any given time, a fraction y of the population, where 0 ? y ? 1, has the virus, while the remaining fraction src="https://sciemce.com/media/4/ppg__wesa0610191635__f1q17g3.jpg" alt="" style="vertical-align: -4.0px;" /> and solve the initial value problem where the number of people who initially have the cold virus is 
does not. Furthermore, the cold virus spreads by interactions between those who have it and those who do not. The number of such interactions is proportional to y(1 - y). Therefore, the equation that describes the spread of the virus is 
where k is a positive real number. Assume 
A. y = 
B. y = 
C. y = 
D. y = 
Solve the problem.(i) In general terms, how does the surface-area-to-volume ratio of a rat compare to that of a gorilla?(ii) Which animal must maintain a higher rate of metabolism to replace the heat lost through the skin?
A. (i) The surface-area-to-volume ratio of a rat is higher than the surface-area-to-volume ratio of a gorilla. (ii) The rat must maintain a higher rate of metabolism. B. (i) The surface-area-to-volume ratio of a rat is equal to the surface-area-to-volume ratio of a gorilla. (ii) Both animals must maintain the same rate of metabolism. C. (i) Cannot compare the two because one type of creature is a mammal and the other is not. (ii) Cannot compare the two because one type of creature is a mammal and the other is not. D. (i) The surface-area-to-volume ratio of a rat is lower than the surface-area-to-volume ratio of a gorilla. (ii) The gorilla must maintain a higher rate of metabolism.
A system of nonlinear equations is given. Sketch the graph of the equation of the system and then determine the number of real solutions to the system. Do not solve the system.2x2 = y + 5y = -10x + 7
A. One
B. One
C. Two
D. Two
Divide.(-16.6708) ÷ (-2.84)
A. 2.84 B. 5.87 C. -5.87 D. -2.84