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vodka [1.7K]
4 years ago
10

What is 690 as a decimal

Mathematics
1 answer:
Darya [45]4 years ago
7 0
The decimal to 690 it’s going to be 6.9
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Which of thw following is equivalent to √20?​
kupik [55]

Answer:

it is b

Step-by-step explanation:

3 0
3 years ago
An electric current, I, in amps, is given by I=cos(wt)+√8sin(wt), where w≠0 is a constant. What are the maximum and minimum valu
exis [7]
Take the derivative with respect to t
- w \sin(wt) + \sqrt{8} w cos(wt)
the maximum and minimum values occur when the tangent line is zero so we set the derivative to zero
0 = -w \sin(wt) + \sqrt{8} w cos(wt)
divide by w
0 =- \sin(wt) + \sqrt{8} cos(wt)
we add sin(wt) to both sides

\sin(wt)= \sqrt{8} cos(wt)
divide both sides by cos(wt)
\frac{sin(wt)}{cos(wt)}= \sqrt{8}   \\  \\ arctan(tan(wt))=arctan( \sqrt{8} ) \\  \\ wt=arctan(2 \sqrt{2)} OR\\ wt=arctan( { \frac{1}{ \sqrt{2} } )
(wt)=2(n*pi-arctan(2^0.5))
(wt)=2(n*pi+arctan(2^-0.5))
where n is an integer
the absolute max and min will be

I=cos(2n \pi -2arctan( \sqrt{2} ))
since 2npi is just the period of cos
cos(2arctan( \sqrt{2} ))= \frac{-1}{3} 

substituting our second soultion we get
I=cos(2n \pi +2arctan( \frac{1}{ \sqrt{2} } ))
since 2npi is the period
I=cos(2arctan( \frac{1}{ \sqrt{2}} ))= \frac{1}{3}
so the maximum value =\frac{1}{3}
minimum value =- \frac{1}{3}


4 0
3 years ago
How do I solve this? (Geometry)
Luden [163]

Answer:

Step-by-step explanation:

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hope it helps

8 0
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Simplify 3(x-6)-4(x+3)
Finger [1]

Answer:

Step-by-step explanation:

look this up it give you the answer

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7 0
3 years ago
Read 2 more answers
A store pays $10 for a blanket, and the markup is 115%. A customer will also pay a 5 1/2% sales tax. What will be the total cost
Naddik [55]
Firstly, we need to find the price of the blanket/bracelet after the 115% increase.
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Now for the 5.5% sales tax, which is applied the the new value of $15.20
     $15.20 x 0.055 = 0.83
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The final cost for the blanket/bracelet is %16.03
8 0
4 years ago
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