Answer:
The 95% confidence interval based on this sample is =
[6.41, 7.79]
Step-by-step explanation:
The formula for Confidence Interval =
Mean ± z × standard deviation/√n
Sample mean = 7.1 hours
Standard deviation = 5 hours
n = 200 students
z = 95% confidence interval z score
= 1.96
C.I = 7.1 ± 1.96 × 5/√200
C.I = 7.1 ± 0.693
Hence, Confidence Interval
= 7.1 - 0.693
= 6.407
Approximately = 6.41
= 7.1 + 0.693
= 7.793
Approximately = 7.79
Therefore, the 95% confidence interval based on this sample is
[6.41, 7.79]
we have
Factor the leading coefficient
Complete the square. Remember to balance the equation by adding the same constants to each side
Divide both sides by
Rewrite as perfect squares
Taking the square roots of both sides (square root property of equality)
Remember that
<u>the answer is</u>
The solutions are
Answer:
t>82
Step-by-step explanation:
Let t be number of tickets sold by the committee.
We have been given that the committee earns $4 for each ticket they sell, so money earned from selling t tickets will be 4t.
Per ticket earns by ticket = $4
Cost of bake sale = $72
so the solution of inequality is;
400 < 4t + 72;
t is number of tickets;
Now calculating the t = ?
400-72 < 4t;
82 < t
Answer:
Step-by-step explanation:
0 1
3 3 ⟌ 6 4
- 0
6 4
- 3 3
3 1
First if you know all the fractions and it will be really easy for you to figure this out all you have do is add all the numbers that you have and you will get it good luck!