Answer:
x=-6
Step-by-step explanation:
3×-6=-18
-18×-6=108
108×-6=-648
Answer:
The sample size needed is 40000.
Step-by-step explanation:
The sample size needed is:
Use this formula to determine the sample size needed for a margin of error of 0.005
This is n when 
. So
The sample size needed is 40000.
Answer: 2x + 40 = 150
Step-by-step explanation:
Jane has 150 feet of fencing. 40 feet will go for the portion opposite the house, The remaining fencing will go for the two sides of equal length x. That makes 2x for both. So:
<u>2x + 40 = 150</u>
[x = 55 feet]
Answer:
The probability is 0.6796
Step-by-step explanation:
Given
Population Mean - 100
Population Standard Deviation - 25
As we know
z = x-μ/σ, where:
z is the standard score
x is the raw score
μ is the population mean
σ is the population standard deviation
Z value for mean of sample = 95
z1 = -100+95/25 = -5/25 = -0.2
P value for Z = -0.2 is 0.2912
Z2 = 100-105/25 = 0.2
P(z > 0.2 = 1 - P(z ≤ 0.2) = 1 - 0.0294 = 0.9706
P(-0.2 < z < 0.2) = 0.9706 - 0.2912= 0.6796
The probability is 0.6796
