How many four-character passwords can be formed using the characters A, B, C, 1, 2 if the characters can be repeated
1 answer:
You might be interested in
Answer:
Option C and option D
Step-by-step explanation:
we have that
This is the equation of a vertical parabola open upward
The vertex is a minimum
Convert the equation into vertex form
Complete the square
----> equation of the parabola in vertex form
The vertex is the point (2,1)
therefore
when the bird is 2 feet away from the first fence post, it reaches its minimum height of 1 foot