Answer:
(48.3875, 51.6125)
Step-by-step explanation:
At 99% level of significance
From the normal standard deviation table 
Considering that
± 
=50±
50±2.33(0.625)=50±1.6125=(48.3875, 51.6125)
Therefore, there’s 99% confidence that the mean lifetime of a certain brand of tires is between 48.3875 and 51.6125
Answer:
Step-by-step explanation:
i think you are talking about the diameter of the circle.
equation of the circle is
(x-1)(x+3)+(y-8)(y-2)=0
x^{2}-x+3x-3+y^{2}-8y-2y+16=0
or x^{2}+y^{2}+2x-10y+13=0
Answer:
Option 2.
Step-by-step explanation:
You are bisecting angle BAC with pencil and compass.
You have to use the Pythagorean theorem a squared plus b squared is c squared so 13 squared plus 18 squared equals c squared. 13x13=169 18x18=324 169+324=493 so c squared is 493 to get c you square root 493 which equals 22.2 so the diagonal, c, is 22.2 centimeters long
Answer:
Isolate the variable by dividing each side by factors that don't contain the variable.
x=−3
Step-by-step explanation:
