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3 years ago

10

Claire has a hot tub with a diameter of 7 feet. She wants to purchase a cover to protect the hot tub. What is the area of the co

ver? Use = 3.14 and round the answer to the nearest square foot. ft2

2 answers:

ahrayia [7]3 years ago

8 0

The area of the cover is 38 square feet

sesenic [268]3 years ago

3 0

Answer:

38 ft

Step-by-step explanation:

Give the person underneath me brainless now.

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Solve please 4x^2+ 8xy - 60y^2

Stells [14]

4x^2+ 8xy - 60y^2 =48x^3y^3

7 0

4 years ago

Find the surface area of this cube. Be sure to include the correct unit in your answer.

Alexxx [7]

Answer:

486 cm

Step-by-step explanation:

9×9=81

there are 6 faces

81×6=486

7 0

2 years ago

Use the Chain Rule to find the indicated partial derivatives. z = x^4 + xy^3, x = uv^4 + w^3, y = u + ve^w Find : ∂z/∂u , ∂z/∂v

k0ka [10]

I'll use subscript notation for brevity, i.e. $\frac{\partial f}{\partial x}=f_x$ .

By the chain rule,

$z_u=z_xx_u+z_yy_u$

$z_v=z_xx_v+z_yy_v$

$z_w=z_xx_w+z_yy_w$

We have

$z=x^4+xy^3\implies\begin{cases}z_x=4x^3+y^3\\z_y=3xy^2\end{cases}$

and

$\begin{cases}x=uv^4+w^3\\y=u+ve^w\end{cases}\implies\begin{cases}x_u=v^4\\x_v=4uv^3\\x_w=3w^2\\y_u=1\\y_v=e^w\\y_w=ve^w\end{cases}$

When $u=1,v=1,w=0$ , we have

$\begin{cases}x(1,1,0)=1\\y(1,1,0)=2\end{cases}\implies\begin{cases}z_x(1,2)=12\\z_y(1,2)=12\end{cases}$

and the partial derivatives take on values of

$\begin{cases}x_u(1,1,0)=1\\x_v(1,1,0)=4\\x_w(1,1,0)=0\\y_u(1,1,0)=1\\y_v(1,1,0)=1\\y_w(1,1,0)=1\end{cases}$

So we end up with

$\boxed{\begin{cases}z_u(1,1,0)=24\\z_v(1,1,0)=60\\z_w(1,1,0)=12\end{cases}}$

3 0

3 years ago

A recent survey showed that 23.3 million adults have cut the cord on cable TV services, a 30% increase fron the previous year. I

sesenic [268]

Answer:

30,290,000 people

Step-by-step explanation:

The question is asking if the trend continues from the PREVIOUS year, so we would find the 30% of 23,300,000

23,300,000/100 = 233,000 = 1%

233,000 x 30 = 6,990,000

23,300,000 = 6,990,000 = 30,290,000

4 0

3 years ago

Help please thank you

olganol [36]

Answer:

-7 =D

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers