Answer:
Here, Diameter of the whole tube = 10 m
Diameter of the inner tube= 10mm - 2 mm= 8mm
Now,
Area of the shaded region =1/4 ×πd^2
=1/4×3.14×8^2
=50.24 mm^2
Answer:

Step-by-step explanation:
The point-slope form of an equation of a line:

m - slope
We have

Substitute:

Convert to the slope-intercept form

<em>use the distributive property</em>
<em>add 3 to both sides</em>

Convert to the standard form

<em>multiply both sides by 3</em>
<em>add x to both sides</em>

-3(x-5)=45
distribute
-3x+15 = 45
subtract 15 from each side
-3x = 30
divide by -3
x = -10
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6.48 / 4 =1.62 is your answer