Um that's gotta be a least hold up nevermind
Step-by-step explanation:
just like an equation.
5x - 7 > 4x + 8 | -4x + 7
x > 15
and that is your result.
in contrast to an equation, an inequality delivers a range as result and not a single point.
Answer:
21.46 cm²
Step-by-step explanation:
So we need to find the r for the circle
r=10/4=5/2
so the area of one circle is Ac=πr²
Ac=π(5/2)²=25/4π
and there are 4 of them: 25/4π*4=25π=78.54
the area of square is 10²=100
100-78.54=21.46 cm²
Answer:
B. One can be 90% confident that the mean additional tax owed is between the lower and upper bounds.
Step-by-step explanation:
Given:
n= 81


Solution:
A confidence interval, in statistics, refers to the probability that a population parameter will fall between two set values for a certain proportion of times. Confidence intervals measure the degree of uncertainty or certainty in a sampling method. A confidence interval can take any number of probabilities, with the most common being a 95% or 99% confidence level.
Confidence interval = 
To Find the z value:
Degree of freedom = n-1
=>81- 1
=> 80
Significance level = 1- confidence level
=>
=>
=> 
=>0.05
using this value In T- Distribution table we get
z = 1.645
Substituting the values we have,
confidence interval = 
confidence interval = 
confidence interval = 
confidence interval = 
confidence interval= (2939.18, 3876.83)