<span>The correct option is: A. f(x) = 4sin(x − π/2), because:
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1. When you evaluate x=π/2 in the function f(x) = 4sin(x − π/<span>2), you obtain:
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f(π/2) = 4sin(π/2− π/2)
f(π/2) = 4sin(0)
f(π/2) = 4(0)
f(π/2) = 0 (As you can see in the graphic)
2. If you evaluate x=π in the same function, then you have:
f(π) = 4sin(π− π/2)
f(π) = 4sin(π/2)
f(π) = 4 (As it is shown in the graphic)
<u>answer:</u> 
<u>work:</u>
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hope this helps! ❤ from peachimin
Its been a slight while since I have done probibility, but from what I remember, I came op with the answer of a 2.3% probability that all of her friends would be able to come to the lunch she plans on the 4 different days.
