2 years ago

Help me with this problems

Mathematics

1 answer:

ale4655 [162]2 years ago

5 0

Answer:

its easy

Step-by-step explanation:

you should change all into degrees

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State if the triangle is acute obtuse or right

Dmitrij [34]

Answer:

It should be obtuse.

Step-by-step explanation: if i'm not mistaken it has to be obtuse. sorry i'm still learning i'm a beginner but, i'm volunteering to help everyone anyways because i'm a very nice person.

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3 years ago

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The rate of change of revenue (in dollars per calculator) from the sale of x calculators is R′(x)=(x+1)ln(x+1)R ′ (x)=(x+1)ln(x+

jekas [21]

Answer:

Total revenue = $\frac{169}{2}\ln(13)-\frac{169}{4}$ dollars

Step-by-step explanation:

$R'(x)=(x+1)\ln(x+1)$

Integrate with respect to $x$ .

$R(x)=$ ∫ $(x+1)\ln(x+1)$ dx

Take $x+1=u$

Differentiate with respect to $x$

$dx=du$

So,

$R(x)=$ ∫ $u\ln(u)\,du$

Use integration by parts: ∫f g dx = f∫ g dx-∫(∫g dx)f' dx

Therefore,

$R(x)=$ $\frac{u^2}{2}\ln(u)$ $-$ ∫ $\frac{u^2}{2}\frac{1}{u}\,du$

= $\frac{u^2}{2}\ln(u)$ $-$ ∫ $\frac{u}{2}\,du$

Put $u=x+1$

$R(x)= \frac{(x+1)^2}{2}\ln(x+1)-\frac{(x+1)^2}{4}$

To find total revenue from the sale of the first 12 calculators, put $x=12$

$R(x)= \frac{(12+1)^2}{2}\ln(12+1)-\frac{(12+1)^2}{4}\\\\= \frac{(13)^2}{2}\ln(13)-\frac{(13)^2}{4}\\\\=\frac{169}{2}\ln(13)-\frac{169}{4}$

Total revenue = $\frac{169}{2}\ln(13)-\frac{169}{4}$ dollars

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3 years ago

I'm not sure to use 6 or 10 for a side length

dlinn [17]

Answer:

Step-by-step explanation:

6 is the width not the length

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3 years ago

1.6÷_=4 a deciaml division promblem what is the missing divisor

Sladkaya [172]

1.6 divided by x =4

we can exchange the 4 and the x

1.6 divided by 4 =x

.4 =x

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What does a value of 8 in 589310 compare yo the value of the 8 ine 598301

shepuryov [24]

Answer:

Step-by-step explanation:

It is 10 times as much

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2 years ago

Help me with this problems ​

Help me with this problems