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Bad White [126]

2 years ago

6

Ella buys a computer for $785. Her local tax rate is 7%. How much does Ella pay for the computer, including tax? please answer q

uick

1 answer:

musickatia [10]2 years ago

6 0

Answer:

$839.95

Step-by-step explanation:

Before Tax Price: $785.00

Sale Tax: 7.00% or $54.95

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What 66% of 666? it has been bothering me for ages

Softa [21]

Hiiii it's 4.39.56 !!

4 0

2 years ago

QUICK If r+t = r and r−t = −s which of the following must be equal to t?

lord [1]

Answer:

Well t has to be zero, for r+t to equal r itself. so -s is equal to r, because it's r-0. Answer is C

5 0

2 years ago

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

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

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

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

4 0

2 years ago

Does -7 • 8 = 7 • (-8) ?

goldenfox [79]

Yes, because it does not matter which order you multiply the factors in; you will always get the same answer.

3 0

2 years ago

Read 2 more answers

Which graph represent the solution set of y=x^2+4x+3 and y=2x+6

Mamont248 [21]

Answer:

solution set are

$(-3,0)$

$(1,8)$

Step-by-step explanation:

we are given system of equation as

$y=x^2+4x+3$

$y=2x+6$

For finding solution set , we can draw graph of both equations

and then we can find intersection point

the intersection point will be our solution set

we get graph as

So, solution set are

$(-3,0)$

$(1,8)$

4 0

2 years ago