Answer:
The answers should be C, then B, and then D
Step-by-step explanation:
Answer:
Where's the geometric sequence?
1.
8 is not a factor of 12.
Correct answer: B.{1, 2, 3, 4, 6, 12}
2.
5r + 8 < 63
5r < 55
r < 11
Answer: A.{r|r<11}
3.
A symbol is missing.
Are you looking for the complement of set P?
If so, answer is elements from the universal set not in set P.
Answer: C.{1, 3, 5, 7}
4.
Some symbols are missing, so I don't understand what the questions are.
Answer:
Grade D score:

Step-by-step explanation:
We are given the following information in the question:
Mean, μ = 78.8
Standard Deviation, σ = 7.1
We are given that the distribution of scores on test is a bell shaped distribution that is a normal distribution.
Formula:

D: Scores below the top 77% and above the bottom 9%
We have to find the value of x such that the probability is 0.77
Calculation the value from standard normal z table, we have,
We have to find the value of x such that the probability is 0.09

Calculation the value from standard normal z table, we have,
Thus, the numerical value of score to achieve grade D is
