Answer:
E. There is sufficient evidence that the mean of the pressure required to open a certain valve has increased.
Step-by-step explanation:
Null hypothesis(H0): μ= 8.4 psi
Alternative hypothesis (H1): μ> 8.4 psi
If the test was due with a representative minimum number of observations. And, if the null hypothesis was rejected, then the mean pressure required to open a valve is greater than 8.4 psi. We can conclude that (at a certain level of confidence) there is sufficient evidence that the mean of the pressure required to open a certain valve has increased.
Answer:
∠ OMN = 90°
Step-by-step explanation:
The angle between the tangent and the radius of a circle at the point of contact is right, thus
∠ OMN = 90° ( angle between tangent and radius )
Answer:
t = 5.39
Step-by-step explanation:
h = 6 + 33t - 162
Insert the height that they gave you for h (22) and solve for t .
22 = 6 + 33t - 162
add 162 to both sides
184 = 6 + 33t
subtract 6 from both sides
178 = 33t
divide both sides by 33
178/33 = 33t/33
5.3939 = t
Rounding to nearest hundredth t = 5.39
There are no other values that will work.
Answer:
Denote O as center of circle, draw OA, OC.
As property of tangent line from outside of circle (angle OAD = angle OCD = 90 deg):
=> AOC + D = 180
Moreover, angle AOC = 2 x angle B = 2 x 65 = 130
=> D = 180 - 130 = 50 deg
Hope this helps!
:)
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<h2>Step-by-step explanation :</h2>
Total shared part:
1/4 + 1/8
Taking LCM and adding:
2/8+1/8
Adding gives:
3/8