It seems like you forgot to post the answer choices. However, bats are one animal where they can fly but they aren't birds. So this is one counter-example to prove the claim false. Another example would be any flying insects.
Answer:
190 possibilities.
Step-by-step explanation:
The problem is called 20 choose 2, given by the formula for combinations
C(20,2) = 20! / (2! (20-2)!) = 190
alternatively, we can reason it this way:
there are 20 choices to choose a captain and 19 choices for an alternate captain for a total of 380 ways.
However, there are 20 choices to choose an alternate captain and 19 choices for a captain for a total of 380 ways.
Since we are essentially double counting every choice of the posts, we need to divide 380 by 2 to get 190 ways.
The type of polygon is parallelogram and area of the polygon is 8 units
Answer:
<u>6.2 = Altitude</u>
Step-by-step explanation:
Hypotenuse = 8
Base = 5
Altitude = x
Hypotenuse² = Base² + Altitude²
8² = 5² + Altitude²
64 = 25 + Altitude²
64 - 25 = Altitude²
39 = Altitude²
√39 = Altitude
<u>6.2 = Altitude</u>
