P(t) = [ 64/ (1 + 11.e⁽⁻⁰ ⁰⁸t⁾]
In 1991, t = 1, hence:
P(t) = [ 64/ (1 + 11.e⁽⁻⁰ ⁰⁸ˣ¹⁾] = 5.7377 billion or rounded 5.74 billion
(Answer A)
Answer:
See explanation
Step-by-step explanation:
The range of the cosine function is 
Therefore
is not defined.
Assuming your question is rather 
Then
in the second quadrant.


The answer is 3 because Pythagorean triplets consist of 3,4 and 5.