Q)
(chatquestion)...For items 13 to 17: Let t represent the incubation period (in days) of QUAVID -a certain deadly virus that
spreads quadratically with time.
13. The fraction of infected citizens of a population at any value of time t20 is best described by :
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A) n(t) =e
D) n(1) =
B) n(1) =e
E) n(t) = log,
C) n(t) =
14. The quadratic curve in the previous item may be flattened by strict implementation of social/physical
distancing between all members of the community. The fraction of infected citizens of a population at any
positive value of time t is now described by:
A) n(t)=e
D) n(1) =
B) n(1) =
E) n(t) = log,
C) n(t) =|
15. If the incubation period of QUAVID is 14 days, when does the flattened QUAVID curve peak? (Hint:
Set the derivative to zero.)
A) 28 days
B) 14 days
C) 21 days
D) 7 days
E) I month
16. Plot the n(1) vs. (in days), and indicate where it peaks.
17. Find the "area" under the curve of n(t) fromt = 0 to 1= 0. What is the interpretation of this "area"?
18. Find the derivative of arctan(x) with respect to x.
19. Find the mean value of the cos (x).
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