Answer:
First one
Step-by-step explanation:
a11 = a1 + (11-1)(7)
50 = a1 + 70
a1 = -20
an = -20 + 7(n-1)
No , because if you were to add 4+6 in the second equation you’ll get 10 then subtract the 4 on the right side that would give you. 2d + 6 = 5. So 2d + 4 = 5 is not the same as 2d + 6 = 5
In life nothing is impossible
Answer:
1,100 / 8
Step-by-step explanation:
Answer:
1
Step-by-step explanation:
Given :
Mean, μ = 4
Standard deviation, s = 0.8
Sample size, n = 30
The distribution is independent.
Z = (x - μ) / s /sqrt(n)
Probability that downtime period is between 1 and 5
P(1≤ x ≤ 5) :
[(x - μ) / (s /sqrt(n))] ≤ Z ≤ [(x - μ) / (s /sqrt(n))]
[(1 - 4) / (0.8 /sqrt(30))] ≤ Z ≤ [(5 - 4) / (0.8 /sqrt(30)]
[-3 / 0.1460593] ≤ Z ≤] 1 / 0.1460593]
P(-20.539602 ≤ Z ≤ 6.8465342)
P(Z ≤ 6.8465342) - P(Z ≤ - 20.5396)
P(Z ≤ 6.8465342) = 1 (Z probability calculator)
P(Z ≤ - 20.5396) = 0 (Z probability calculator)
1 - 0 = 1