Every possible cross section of a three dimensional figure is a circle what is that figure
2 answers:
Answer:
Sphere
Step-by-step explanation:
Please refer to the attachment. Sphere is the 3D figure which when intersected by any plane , it will give us the circle. In attachment we see a red sphere of radius of 1. And the grey xy plane is intersecting the sphere which giving us the horizontal circle. Similarly yz and xz plane on intersecting gives two vertical circles. It is not just xy , yz, or xz plane but any plane when intersected to sphere gives a circle.
Hence our answer is Sphere
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Answer:
a
The 95% confidence interval is
b
The sample proportion is
c
The critical value is
d
The standard error is
Step-by-step explanation:
From the question we are told that
The sample size is n = 200
The number of defective is k = 18
The null hypothesis is
The alternative hypothesis is
Generally the sample proportion is mathematically evaluated as
Given that the confidence level is 95% then the level of significance is mathematically evaluated as
Next we obtain the critical value of from the normal distribution table, the value is
Generally the standard of error is mathematically represented as
substituting values
The margin of error is
=>
=>
The 95% confidence interval is mathematically represented as
=>
=>
Answer:
Step-by-step explanation:
We want to find the sum of
We can rewrite this as
This becomes;
Recall that;
This implies that;
Combine like terms: