Answer: 20 students participate in school sports.
Step-by-step explanation:
Since, Mrs. Perez has 28 students.
And, According to the question, 5 /7 of those students participate in school sports.
Therefore, the students participate in school sports = 5/7 of the total number of the students
=
= 20
Thus 20 students participate in school sports.
Find the diameter of a circle with circumference of 15.70
Solution: We are given:
The circumference of a circle
We are required to find the diameter of the circle based on given circumference.
We know that:
rounded to two decimal places
Therefore, the diameter of the circle with circumference 15.70 is 5
Answer:
The reliability of the first system to work is 0.72 whereas the reliability of the second system to work is 0.98.As the reliability of the second system is more than the first one so the second system is more reliable.
Step-by-step explanation:
For first system as given in the attached diagram gives,
As the systems are independent.
The given data indicates that
Now the probability of the system is given as
So the reliability of the first system to work is 0.72.
For the second system is given as
Where
So now the probability of the second system is given as
So the reliability of the second system to work is 0.98.
As the reliability of the second system is more than the first one so the second system is more reliable.
