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77julia77 [94]
3 years ago
10

4. When the decimal in 100 is moved

Mathematics
2 answers:
grigory [225]3 years ago
5 0
Answer A 10

You would move the decimal to the left by one number
Ex/ 10.0
ehidna [41]3 years ago
4 0

Answer:

10

Step-by-step explanation:

because you move one spot, and take off one zero

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A stack of 150 peices of Paper is 2.5 cm thick. How many peices of paper are in a pile that is 6.5 cm thick?
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Find the scale factor of the height:

6.5cm / 2.5cm = 2.6

Multiply the known pages by the scale factor:

150 x 2.6 = 390 pieces of paper.
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3 years ago
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The number of subscribers to a newsletter decreased from 2400 to 1944. What was the percent of decrease in circulation?
fenix001 [56]
The percentage decrease is 19%
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Need help with math homework
Pavel [41]

Hello!

The answer for A is:

X1=-1\\X2=5

The answer for B is: The rocket will hit the lake surface in 5 seconds.

<h2>Why?</h2>

Defining the terms:

a=-16\\b=64\\c=80\\

So, replacing it in the quadratic equation (it's given to you in the exercise)\\

x=\frac{-b+-\sqrt{b^{2}-4*a*c } }{2*a}

x=\frac{-64+-\sqrt{64^{2}-4*-16*80 } }{2*-16}

x=\frac{-64+-\sqrt{64^{2}+5120} }{-32}=\frac{-64+-\sqrt{4096+5120} }{-32}\\x=\frac{-64+-\sqrt{9216} }{-32}=\frac{-64+-\ 96 }{-32}\\x=\frac{-64+-\ 96 }{-32}\\x1=\frac{-64+\ 96 }{-32}=\frac{32}{-32} =-1\\\\x1=\frac{-64-\ 96 }{-32}=\frac{-160}{-32} =5\\

We are working with a quadratic equation, so we will have two possible results,

X1=-1\\X2=5\\

Now, we are asked to find the time, time can not be a negative value, we have to discard X1 (-1) since it's a negative value, knowing that, the rocket will hit the lake after 5 seconds.

Have a nice day!

5 0
4 years ago
A scale drawing of a billboard uses the scale 4cm:9 ft. The length of the billboard in the drawing is 11 cm. How long is the act
kiruha [24]
Okay so if

4cm:9ft

Than

8cm:18ft
2cm:4.5ft
1cm:2.25ft

Okay so

1•11=11
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The answer is 24.75ft
8 0
3 years ago
PLZZZ HELPPPP WILL MARK BRAINLIEST
ehidna [41]

Answer: 1

Heres why: If you subtract the 1 from 2 you get 1

4 0
3 years ago
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