3 years ago

Hoi every1, i tem, and i ned help wit complcation problem

Mathematics

1 answer:

torisob [31]3 years ago

8 0

There is not picture but you can send one to me through message, I'm also new but im a valedictorian!!!

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X and Y are two stations which are 320 miles apart. A train starts at a certain time from X and travels towards Y at 70 mph. Aft

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3 years ago

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Use synthetic division to solve (x^3+1)/(x-1). What is the quotient?

Sav [38]

Answer:

x^2 +x +1

Step-by-step explanation:

See below for the tableau. The quotient is x^2 +x +1.

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3 years ago

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Liula [17]

Answer:

A = 1.5386

Step-by-step explanation:

Quarter circle area formula:

A = (πr²)/4

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2 years ago

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How many square decimeters are in 687.1 cm²?

Alexus [3.1K]

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6.871 decimeters

Step-by-step explanation:

687.1 square centimeters = 6.871 square decimeters

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2 years ago

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Evaluate the surface integral. s y ds, s is the helicoid with vector equation r(u, v) = u cos(v), u sin(v), v , 0 ≤ u ≤ 6, 0 ≤ v

Juliette [100K]

Compute the surface element:

$\mathrm dS=\|\vec r_u\times\vec r_v\|\,\mathrm du\,\mathrm dv$

$\vec r(u,v)=(u\cos v,u\sin v,v)\implies\begin{cases}\vec r_u=(\cos v,\sin v,0)\\\vec r_v=(-u\sin v,u\cos v,1)\end{cases}$

$\|\vec r_u\times\vec r_v\|=\sqrt{\sin^2v+(-\cos v)^2+u^2}=\sqrt{1+u^2}$

So the integral is

$\displaystyle\iint_Sy\,\mathrm dS=\int_0^\pi\int_0^6u\sin v\sqrt{1+u^2}\,\mathrm du\,\mathrm dv$

$=\displaystyle\left(\int_0^\pi\sin v\,\mathrm dv\right)\left(\int_0^6u\sqrt{1+u^2}\,\mathrm du\right)$

$=\dfrac23(37^{3/2}-1)$

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3 years ago