Answer:
A.
Step-by-step explanation:
Answer:
The decibel range is
Step-by-step explanation:
Let
d -----> the decibel level of the music
we know that
The absolute value of the difference of the decibel level of the music and its average, must be less than or equal to 28 decibels
so
The absolute value that represent this problem is
Solve the absolute value
<em>First solution (positive)</em>
Adds 110 both sides
<em>Second solution (negative)</em>
Multiply by -1 both sides
Adds 110 both sides
therefore
The decibel range is
Answer:
113.09734
Step-by-step explanation:
A committee consists of eight students and five faculty.
how many possible five-person subcommittees are there?
Answer: We have a total of 13 people from whom we have to choose 5-person subcommittee.
Therefore, the number of possible ways is:
ways
how many that contain exactly three students?
Answer: The number of ways that will contain exactly three students is:
ways
how many that contain at least three students
Answer: The number of ways that will contain at least three students is:
ways