Answer:
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Answer: 
Step-by-step explanation:
Let the given parabolic mirror opens upwards and vertex=(0,0)
Focus point of the parabolic mirror is located 2 inches from the vertex of the mirror. ∴ p=2
Since, the parabola opens upward, then the equation of the parabola is of the form 
Substitute the value of p=2 in this, we get the equation of the parabolic mirror

Hence, the equation of the parabola that models the cross section of the mirror is 
Answer:
,
,
, 
Step-by-step explanation:
1880:
The predicted value is:


The residual value is:


1920:
The predicted value is:


The residual value is:


Answer:
X=105
Step-by-step explanation:
Add angles
55+50 = 105
subtract from 180
180-105 = 75
it’s consecutive angles so subtract from 180
180-75 = 105