Answer:
d. 40
Step-by-step explanation:
The number of faces, edges and vertices is related by the following formula:
In which V is the number of vertices, E is the number of edges and F is the number of faces.
In this question:
We want to find E. So
The correct answer is given by option D.
Answer:
False
Step-by-step explanation:
We are given the following information:
We treat adult who prefer one child to be a boy as a success.
P(prefer one child to be a boy) = 40% = 0.4
Then the number of adults follows a binomial distribution, where
where n is the total number of observations, x is the number of success, p is the probability of success.
Now, we are given n = 15 and x = 8
We have to evaluate:
Since the probability of 8 or more is 0.2131 is not very small, thus, it is not a rare event.
Thus, the given statement is false.
Answer:
I
Step-by-step explanation:
9514 1404 393
Answer:
- 4°
- 48°
Step-by-step explanation:
The inverse cosine function of your calculator is used to find the angle from the cosine value. (Be sure your calculator is set to 'degrees' mode.)
1) A = arccos(0.9976) ≈ 4°
2) U = arccos(0.6691) ≈ 48°