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3 years ago

BRAINIEST TO WHOEVER RIGHT

Mathematics

1 answer:

kherson [118]3 years ago

4 0

Answer:

3-14

Step-by-step explanation:

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Please help me with the below question.

o-na [289]

Given that

$\vec r(t) = \left\langle 4t e^{-t}, 8 \arctan(t), 8 e^t \right\rangle$

we first differentiate with respect to t to get the tangent vector, $\vec T(t)$ :

$\vec T(t) = \dfrac{d\vec r}{dt} = \left\langle (4-4t) e^{-t}, \dfrac8{1+t^2}, 8e^t \right\rangle$

At t = 0, the tangent vector is

$\vec T(0) = \left\langle 4, 8, 8 \right\rangle$

To get the <em>unit</em> tangent vector, multiply this by 1/(norm of tangent vector) :

$\|\vec T(0)\| = \sqrt{4^2 + 8^2 + 8^2} = \sqrt{144} = 12$

Then the unit tangent vector is

$\dfrac{\vec T(0)}{\|\vec T(0)\|} = \left\langle \dfrac4{12}, \dfrac8{12}, \dfrac8{12}\right\rangle = \boxed{\left\langle\dfrac13, \dfrac23, \dfrac23\right\rangle}$

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2 years ago

Explain how to use models to divide 2.1 by 0.7

gregori [183]

Answer:

Step-by-step explanation:

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3 years ago

Who runs the fastest

klemol [59]

Answer:

Ron run faster then other

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2 years ago

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A pyramid is approximately 24 m about the ground and they are 91 steps leading to the temple how high off the ground would you b

EastWind [94]

Answer:

13.19m

Step-by-step explanation:

Divide the total height by the number of step leading

24/91=0.2637 m/step

step 2

Multiply 0.2637 m/step by 50 step

0.2637(50) = 13.19m

Hope this helps!!! :)

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3 years ago

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Help plz???? never learned this

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suppelementary angles are angles that add to 180

remember that a straight line is 180 degrees so some angles that are supplementary are 1 and 2, 5 and 6, 1 and 5, 6 and 2, 3 and 7, 4 and 8, 7 and 8, 3 and 4

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3 years ago

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