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2 years ago

11

Find the Domain of the function

sqrt%7Bx%20%2B%204%7D%20" id="TexFormula1" title="f(x) = \frac{1}{x} + \sqrt{x + 4} " alt="f(x) = \frac{1}{x} + \sqrt{x + 4} " align="absmiddle" class="latex-formula">

1 answer:

xeze [42]2 years ago

8 0

Refer to the attachment!

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Area and perimeter of composite figures

nydimaria [60]

Area is 92.13 and the perimeter is 47.42 i think it’s correct

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2 years ago

What is the slope of the line graphed above?<br> A. -2<br> B. -1<br> c. -1/2<br> d. 1/2<br> E. 2

Ierofanga [76]

Answer:

-1/2

Step-by-step explanation:

pass (0,1) (2,0)

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2 years ago

If a snowball melts so that its surface area decreases at a rate of 3 cm2/min, find the rate (in cm/min) at which the diameter d

grin007 [14]

Answer:

The diameter decreases at a rate of 0.053 cm/min.

Step-by-step explanation:

Surface area of an snowball

The surface area of an snowball has the following equation:

$S_{a} = \pi d^2$

In which d is the diameter.

Implicit differentiation:

To solve this question, we differentiate the equation for the surface area implictly, in function of t. So

$\frac{dS_{a}}{dt} = 2d\pi\frac{dd}{dt}$

Surface area decreases at a rate of 3 cm2/min

This means that $\frac{dS_{a}}{dt} = -3$

Tind the rate (in cm/min) at which the diameter decreases when the diameter is 9 cm.

This is $\frac{dd}{dt}$ when $d = 9$ . So

$\frac{dS_{a}}{dt} = 2d\pi\frac{dd}{dt}$

$-3 = 2*9\pi\frac{dd}{dt}$

$\frac{dd}{dt} = -\frac{3}{18\pi}$

$\frac{dd}{dt} = -0.053$

The diameter decreases at a rate of 0.053 cm/min.

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2 years ago

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DiKsa [7]

If you need to find x. The answer is x=1/-2. Hope this helps!

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3 years ago

Math help on this question!

NemiM [27]

Answer:

none

Step-by-step explanation:

110 + 60 = 170

but 170 is obviously not 180 sooo none will be 60 degrees

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3 years ago