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1 year ago

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25. Which of the following expresses 374,274

1 answer:

Mekhanik [1.2K]1 year ago

5 0

Answer:

3

Step-by-step explanation:

374274 =3.74274 x 100000=3.74272x 10^5

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If the length of each side of an equilateral triangle were increased by 50 percent, what would be the percent increase in the ar

Shkiper50 [21]

Answer:

<u><em>The area increase by 225%</em></u>

<em><u>Step-by-step explanation: </u></em>

<em><u>attachment of a triangle</u></em>

<em><u>The area of a triangle equilateral is calculated with the next formula:</u></em>

<em><u>A= $\frac{a*h}{2}$ </u></em>

<em><u> $h^{2} +(\frac{a}{2})^{2}$ = $a^{2}$ </u></em>

<em><u> $h^{2} = a^{2} - \frac{a^{2} }{4}$ = $\frac{a^{2} }{4}$ *3</u></em>

<em><u>h= $\sqrt{\frac{a^{2}*3 }{4} }$ </u></em>

<em><u>h= $\frac{\sqrt{3}*a }{2}$ </u></em>

<em><u>replacing in the A equation:</u></em>

<em><u>A= $\frac{a*\sqrt{3}*a }{2*2}$ </u></em>

<em><u>A= $\frac{\sqrt{3}*a^{2} }{4}$ </u></em>

<em><u>Now each side increse by 50% ⇒ a=1.5a</u></em>

<em><u>A= $\frac{\sqrt{3}*(1.5a)^{2} }{4}$ </u></em>

<em><u>A= $\frac{\sqrt{3}*a^{2}* 2.25 }{4}$ </u></em>

<em><u>A=2.25 * $\frac{\sqrt{3}*a^{2} }{4}$ </u></em>

<em><u>It means that the area incrase by 225%</u></em>

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2 years ago

(Algebra 2) write a polynomial function of least degree with integral coefficients that has the given zeros.

saveliy_v [14]

Answer:

$x^{2} -2ix+3=0$ .

Step-by-step explanation:

Given the zeroes of the polynomial are

a=-i . and b=3i

The recquired polynomial is $(x-a)(x-b)=0$

On substituting the values of a and b we get

$(x+i)(x-3i)=0$

$x^{2} -3xi+ix-3i^{2}=0$

$x^{2} -2ix+3=0$ . (∵ $i^{2}=-1$ )

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C=2(pi)r use this equation with 9 in place of r

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Answer:

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Step-by-step explanation:

just did it on math-ways

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