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2 years ago

I might mark brainliest I just need help

Mathematics

1 answer:

Artemon [7]2 years ago

8 0

Answer:

i think you have to measure your diagram with a protector to find the angles

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The area of a circular sun spot is growing at a rate of 1,200 km2/s.

Tpy6a [65]

A)

$\bf \textit{area of a circle}\\\\
A=\pi r^2
\\\\\\
\cfrac{dA}{dt}=\pi \cdot 2r\cfrac{dr}{dt}\implies \cfrac{dA}{dt}=2\pi r\cfrac{dr}{dt}\implies \cfrac{\frac{dA}{dt}}{2\pi r}=\cfrac{dr}{dt}\\\\
-----------------------------\\\\
\left. \cfrac{dr}{dt} \right|_{r=3000}\implies \cfrac{1200}{2\pi \cdot 3000}=\cfrac{dr}{dt}\\\\$

B)

$\bf A=\pi r^2\qquad A=490000\implies 490000=\pi r^2\implies \sqrt{\cfrac{490000}{\pi }}=r
\\\\\\
\left. \cfrac{dr}{dt} \right|_{r=\sqrt{\frac{490000}{\pi }}}\implies \cfrac{1200}{2\pi \cdot \sqrt{\frac{490000}{\pi }}}=\cfrac{dr}{dt}
$

8 0

3 years ago

Anyone? Please I need help!!

JulsSmile [24]

Answer:

the correct choice is marked

Step-by-step explanation:

Let x represent the smaller number. Then the larger number is 8x, and the difference is ...

8x -x = 280

7x = 280 . . . . . simplify

x = 40 . . . . . . divide by 7

The larger number is 8x = 8(40) = 320.

_____

<em>Additional comment</em>

Effectively, we have solved for the multiplier (40) that gives the ratio with 320 on top and a difference between top and bottom of 280:

$\dfrac{8}{1}=\dfrac{8\cdot40}{1\cdot40}=\dfrac{320}{40}$

4 0

2 years ago

Simplify the expression to a polynomial in standard form:<br> (3x – 10)(x2+ 2x - 1 )

KonstantinChe [14]

Answer:

3 x ^3 − 4 x ^2 − 23 x + 10

Step-by-step explanation:

hope this helps!

3 0

3 years ago

What percentage of students earning degrees in 2009 were awarded a professional degree?

shusha [124]

Answer:

2.07%

Step-by-step explanation:

92 out of a total of 3,204 graduates earned a professional degree. That works out to 0.0207, or 2.07%.

6 0

3 years ago

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Peterson Packaging Inc. does not currently pay dividends. The company will start with a $0.70 dividend at the end of year three

charle [14.2K]

$1.40 because I think so

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3 years ago