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3 years ago

It’s all yours point and brainlist just get it right

Mathematics

2 answers:

aniked [119]3 years ago

5 0

J. 144

Step-by-step explanation:

4 ÷ 5 = 0.8

0.8 × 180 = 144

ser-zykov [4K]3 years ago

4 0

The answer has to be 144 since it is the only one smaller than 180

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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

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

7 0

2 years ago

Paula and Juan both entered rectangular paintings in the school art show. Paula's painting has a width of 12 inches and an area

vekshin1

Answer:

ANYTHING! MY EXAMPLE - 24x7

Step-by-step explanation:

First, I would like to find out the length of Paula"s painting.

168/12 = 14

So, Paula's dimensions are 12x14

Since we have the area, we could easily just divide 168 by anything.

168/24 = 7

So, Juan's dimensions could be 24x7 (hey that's funny, 24-7?)

Hope this helps!

Please mark brainliest.

7 0

3 years ago

Which equation has roots -3 and 4

RSB [31]

Answer:

x^2 - x - 12 (this is the second answer choice)

Step-by-step explanation:

Multiply (x + 3)(x - 4) and simplify the result:

x^2 - 4x + 3x - 12, or x^2 - x - 12 (this is the second answer choice)

4 0

3 years ago

What is the area of the obtuse triangle with a base of 16 and height of 8

pychu [463]

Answer:

Step-by-step explanation:

The area of a triangle is

A = 1/2 bh

A = 1/2 (16) *8

A =64

5 0

3 years ago

Read 2 more answers

In the rectangular prism shown below, which lines are parallel?

olga_2 [115]

Answer:

JN and LP...............

8 0

3 years ago

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