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3 years ago

What is the absolute value of 1-8i ?

Mathematics

1 answer:

dmitriy555 [2]3 years ago

7 0

|1-8i|
You need to now <em />i to finish the question.

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The diameter of a human hair is .00009 meters. The diameter of a spiders silk is .000003 meters. How much greater is th diameter

Fiesta28 [93]

30; Just divide the human human hair by the spider hair, to see how many times it can go into 0.00009

$\frac{0.00009}{0.000003} =30$

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3 years ago

What is the area of this figure?<br> Please help!!

Olenka [21]

Answer:

16,200 im not sure if its right just multiply everything then add to multiplication x3

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3 years ago

Which quadratic equation is equivalent to (x+2)^2+5(x+2)-6=0

Elis [28]

X^2 + 9x + 8 = 0

You can get this by multiplying and foiling, then simplifying.

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3 years ago

Read 2 more answers

A customer purchased 3 pairs of jeans (j) for $94.50. If each pair of

tamaranim1 [39]

Answer:

$31.50

Step-by-step explanation:

3j = $94.50

j = 94.50 / 3

j = $31.50

7 0

3 years ago

Find the roots of h(t) = (139kt)^2 − 69t + 80

Sonbull [250]

Answer:

The positive value of $k$ will result in exactly one real root is approximately 0.028.

Step-by-step explanation:

Let $h(t) = 19321\cdot k^{2}\cdot t^{2}-69\cdot t +80$ , roots are those values of $t$ so that $h(t) = 0$ . That is:

$19321\cdot k^{2}\cdot t^{2}-69\cdot t + 80=0$ (1)

Roots are determined analytically by the Quadratic Formula:

$t = \frac{69\pm \sqrt{4761-6182720\cdot k^{2} }}{38642}$

$t = \frac{69}{38642} \pm \sqrt{\frac{4761}{1493204164}-\frac{80\cdot k^{2}}{19321} }$

The smaller root is $t = \frac{69}{38642} - \sqrt{\frac{4761}{1493204164}-\frac{80\cdot k^{2}}{19321} }$ , and the larger root is $t = \frac{69}{38642} + \sqrt{\frac{4761}{1493204164}-\frac{80\cdot k^{2}}{19321} }$ .

$h(t) = 19321\cdot k^{2}\cdot t^{2}-69\cdot t +80$ has one real root when $\frac{4761}{1493204164}-\frac{80\cdot k^{2}}{19321} = 0$ . Then, we solve the discriminant for $k$ :

$\frac{80\cdot k^{2}}{19321} = \frac{4761}{1493204164}$

$k \approx \pm 0.028$

The positive value of $k$ will result in exactly one real root is approximately 0.028.

7 0

3 years ago