Answer:
11
Step-by-step explanation:
Step 1:
3/7r+5/8s
Step 2:
So u multiply 3/7 by 14
3/7 x 14= 42/7= 6
Step 2.5:
Now u multiply 5/8 by 8
5/8 x 8= 40/8= 5
Step 3:
<u><em>6+5=11</em></u>
Answer:
Between 12.614 years and 16.386 years
Step-by-step explanation:
Given that:
Mean age (μ) = 14.5 years, standard deviation (σ) = 4.6 years, number o sample (n) and the confidence interval (c) = 90% = 0,9
α = 1 -c = 1 -0.9 = 0.1

The z score of
is the same as the z score of 0.45 (0.5 - 0.05). This can be gotten from the probability distribution table. Therefore:

The margin of error (e) =
= 
The interval = μ ± e = 14.5 ± 1.886 = (12.614 ,16.386)
1. 2√2
2. √5
3. 5√3
4. 10
5. 4√2
6. 3√5
7. 4√3
8. 5√5
9. 3√2
10. 3√3
11. 4
12. 6
13. 5√2
14. 2√3
I think you just do 133/4 -2 unless I’m mistaken