The number of people with the flu during an epidemic is a function, J, or the numer
of days, d, since the epidemic began. The equation f(d) = 5 efines f.

a. How many people had the flu at the beginning of the epidemic? Explain how
you know.

b. How quickly is the flu spreading? Explain how you can tell from the equation.

C. What does f(1) mean in this situation?

d. Does f(3.5) make sense in this situation?

h/o/e/s mad

step-by-step explanation:

si si si

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92

step-by-step explanation:

to determine whether a given function is even, we simply substitute x with -x in the expression. if the result after simplification is identical to the original equation, then the function is said to be even other wise odd.

f(-x) = (-x)^2 - (-x) + 8

      = x^2 + x +8

the resulting function is not identical to the original one;

f(-x) ≠ f(x)

therefore, f(x) is not an even function