3 years ago

Simplify (2a+5)6a^2 Can someone help please

Mathematics

1 answer:

Wewaii [24]3 years ago

5 0

Answer:

12a^3+30a^2

Step-by-step explanation:

6a^2(2a+5)

12a^3+30a^2

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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}
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2 years ago

The volume of a right rectangular prism is 573.3 cm3. The length of the right rectangular prism is 7.35 cm and the height is 16.

Dimas [21]

7.35*16.25=119.43
573.3/119.43 = 4.8
Width=4.8

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3 years ago

Read 2 more answers

A snail travels at a rate of 2.35 ft per minute. How far will the snail travel in 5 minutes

JulsSmile [24]

I believe that you would just multiply 2.35*5 and that would be your answer.
=11.75

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