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Stolb23 [73]
3 years ago
8

Choose the correct expansions. Click to select the correct answers. Click again to unselect answers. Leave the incorrect answers

unselected. 0.345 (3 x 0.1) + (4 x .01) + (5 x 0.001) 0.087 (10 x 0.1) + (8 x .01) + (7 x 0.001) 0.92 (9 x 0.1) + (2 x .001) 0.205 (2 x 0.1) + (0 x .01) + (5 x 0.001) 0.172 (1 x 0.1) + (7 x .01) + (2 x 0.001)
Mathematics
1 answer:
Nadusha1986 [10]3 years ago
3 0
<span>(5 x 0.001) 0.172 (1 x 0.1) + (7 x .01) + (2 x 0.001)</span>
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The half-life of radioactive cobalt is 5.27 years. Suppose that a nuclear accident has left the level of cobalt radiation in a c
sweet [91]

Answer:

  35 years

Step-by-step explanation:

The proportion p that remains after y years is ...

  p = (1/2)^(y/5.27)

In order for 1/100 to remain (the level decays from 100 times to 1 times), we have ...

  .01 = .5^(y/5.27)

  log(0.01) = y/5.27·log(0.5) . . . take logs

  y = 5.27·log(0.01)/log(0.5) ≈ 35.01 ≈ 35 . . . . years

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3 years ago
Ms. Johnson was taking measurements in the Arctic Ocean and measured a temperature of -14.4 degrees Celsius. The temperature inc
otez555 [7]

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qwertyuiop

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3 0
3 years ago
I need this problem solved real quick
PIT_PIT [208]

<u>Let's take this problem step-by-step</u>:

<u>The ;unlabeled angle' adjacent to the 'outside angle of measure 78°'</u>

  ⇒ is on a straight line

     ⇒ sum of angle measure = 180 degrees

       unlabeled_.angle+78 = 180\\unlabeled_.angle = 102

<u>Now we know:</u>

 ⇒ sum of all angles in a triangle ⇒ 180°

<u>Let's put that in equation form and solve:</u>

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<u></u>

Hope that helps!

#LearnwithBrainly

8 0
2 years ago
Can someone please help I can’t understanddd.
dem82 [27]

Hello,

Dividing by 0 is not defined so let s take x different from 4 and -4 and then we can write:

As

f(x)=x^2-7x+12=x^2-4x-3x+12=x(x-4)-3(x-4)=(x-4)(x-3)\\ \\(f\times g)(x)=\dfrac{3(x-4)(x-3)}{(x-4)(x+4)}=\dfrac{3x-9}{x+4}

Thanks

6 0
3 years ago
Multiply. 4x(y+x+z)<br><br>please help​
liubo4ka [24]

Answer:

4xy + 4x² + 4xz

Step-by-step explanation:

4x(y+x+z)

4xy + 4x² + 4xz

3 0
3 years ago
Read 2 more answers
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