Answer:
t=0
Step-by-step explanation:
r=<+1,
>
by differentiating the r vector component by component
r' = <2at, 1>
Two vector are orthogonal when the dot product between them is zero, so:
r'·r=0
<+1,
>·<2at, 1>=2
+2at+t=0
common factor
t(+2a+1)=0
Then, the only real value for t is zero.
-> t=0
➷ The formula for volume of a cylinder is:
The radius is half the diameter
Radius = 8/2 = 4
Substitute the values in:
Surface area =
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Answer:
The length of W'X' will be exactly given by, 12 unit.
Step-by-step explanation:
Rectangle WXYZ is dialated by a factor of to form the rectangle W'X'Y'Z'.
So, if the length of WX is 5 unit, the length of W'X' will be exactly given by,
lenght of WX Dialation factor
= unit
= 12 unit