Excited about the success of celebrity stamps, post office officials were rumored to have put forth a plan to institute two new
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Answer:
(C)x=11.6, y=23.2
Step-by-step explanation:
Using Theorem of Intersecting Secant and Tangent
Applying this theorem in the diagram, we have:
Next, we apply Theorem of Intersecting Chords
PV X VQ=SV X VR
4 X x= 2 X y
Recall earlier we got: x=11.6
2y=4 X 11.6
2y=46.4
Divide both sides by 2
y=46.4/2=23.2
Therefore: x=11.6, y=23.2
Answer:
The confidence interval is
Step-by-step explanation:
From the question we are told that
The sample mean is
The standard deviation is
The sample size is
given that the confidence level is 85% then the level of significance is mathematically represented as
Next we obtain the critical value of from the normal distribution table the value is
Generally the margin of error is mathematically represented as
=>
=>
The 85% confidence interval is mathematically represented as
=>
=>