2 years ago

HELP PLEASE ASAP!! (10 pts)

Mathematics

1 answer:

Mandarinka [93]2 years ago

8 0

Answer:

is there a question or picture?

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pls help me giving brainless. find all angle measures. Assume each truss is symmetric. All of the roofs have a total top peak an

Molodets [167]

Answer:

I hate to do and take the points but so we just got to find the angles?

5 0

2 years ago

Read 2 more answers

What is the 8th term of the sequence 1, 3, 9, 27, 81,... .

slega [8]

9514 1404 393

Answer:

2187

Step-by-step explanation:

This geometric sequence has a first term of 1 and a common ratio of 3. Its general term can be written as ...

an = a1·r^(n-1)

an = 3^(n-1)

Then the 8th term is ...

a8 = 3^(8-1) = 2187

4 0

2 years ago

Let C = C1 + C2 where C1 is the quarter circle x^2+y^2=4, z=0,from (0,2,0) to (2,0,0), and where C2 is the line segment from (2,

trapecia [35]

Not much can be done without knowing what $\mathbf F(x,y,z)$ is, but at the least we can set up the integral.

First parameterize the pieces of the contour:

$C_1:\mathbf r_1(t_1)=(2\sin t_1,2\cos t_1,0)$
$C_2:\mathbf r_2(t_2)=(1-t_2)(2,0,0)+t_2(3,3,3)=(2+t_2, 3t_2, 3t_2)$

where $0\le t_1\le\dfrac\pi2$ and $0\le t_2\le1$ . You have

$\mathrm d\mathbf r_1=(2\cos t_1,-2\sin t_1,0)\,\mathrm dt_1$
$\mathrm d\mathbf r_2=(1,3,3)\,\mathrm dt_2$

and so the work is given by the integral

$\displaystyle\int_C\mathbf F(x,y,z)\cdot\mathrm d\mathbf r$
$=\displaystyle\int_0^{\pi/2}\mathbf F(2\sin t_1,2\cos t_1,0)\cdot(2\cos t_1,-2\sin t_1,0)\,\mathrm dt_1$
${}\displaystyle\,\,\,\,\,\,\,\,+\int_0^1\mathbf F(2+t_2,3t_2,3t_2)\cdot(1,3,3)\,\mathrm dt_2$