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3 years ago

Find the surface area:

Mathematics

2 answers:

ANTONII [103]3 years ago

8 0

Answer:

120 in

Step-by-step explanation:

(5 in * 12 in)/2 = 30 in

30 in * 4 = 120 in

I hope that helps :D

Lapatulllka [165]3 years ago

5 0

120 inches.

good luck

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(b) dy/dx = (x - y+ 1)^2

Elanso [62]

Substitute $v(x)=x-y(x)+1$ , so that

$\dfrac{\mathrm dv}{\mathrm dx}=1-\dfrac{\mathrm dy}{\mathrm dx}$

Then the resulting ODE in $v(x)$ is separable, with

$1-\dfrac{\mathrm dv}{\mathrm dx}=v^2\implies\dfrac{\mathrm dv}{1-v^2}=\mathrm dx$

On the left, we can split into partial fractions:

$\dfrac12\left(\dfrac1{1-v}+\dfrac1{1+v}\right)\mathrm dv=\mathrm dx$

Integrating both sides gives

$\dfrac{\ln|1-v|+\ln|1+v|}2=x+C$

$\dfrac12\ln|1-v^2|=x+C$

$1-v^2=e^{2x+C}$

$v=\pm\sqrt{1-Ce^{2x}}$

Now solve for $y(x)$ :

$x-y+1=\pm\sqrt{1-Ce^{2x}}$

$\boxed{y=x+1\pm\sqrt{1-Ce^{2x}}}$

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3 years ago

A worker at a computer factory can assemble 8 computers per hour.

enyata [817]

25 hours, 8 computers in 1 hour, take 200 computers and divide by 8 to find hours

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3 years ago

A woodworker makes wooden checkerboards. her profit is a function of the price she charges. this graph shows her total profits,

pantera1 [17]

Answer:

Option B.

Step-by-step explanation:

Remember that the profit is defined as the difference between the revenue and the cost.

So, having a profit y = 0 means that the woodworker did not win nor lose anything.

Then the zeros of the function, the values of x such that the graph intersects the x-axis, are the prices such that she does not win nor loss anything.

In the graph we can see that the zeros are at:

x = 15 (the first one)

x = 70 (the second one)

so the zeros are at x = 15 and x = 70, and these are the prices such that the profit is zero, so at these prices she does not make nor lose money.

The correct option is B.

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3 years ago

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The answer is

C.The answer should be 35% of 14

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3 years ago

How many terms are in the expression 4x2 + y - 0 ?<br> help pleaseeee

lawyer [7]

Answer:

3 I did the test to btw

Step-by-step explanation:

did the test

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3 years ago