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Aneli [31]
3 years ago
9

A bacterial cell can double in number every 20 minutes. If one bacterial cell was present at the start of an experiment. How man

y cells would be present after 4 hours
Mathematics
2 answers:
kakasveta [241]3 years ago
7 0
There would be 4096 bacteria cells present.

2^12 = 4096
Alik [6]3 years ago
5 0

60 minuets are in 1 hour, and it will split up times in an hour, that means that there will be cells present.

20 minutes = 2 cells

40 minutes = 4 cells

1 hour = 8 cells

1 hour 20 minutes = 16 cells

1 hour 40 minutes = 32 cells

2 hours = 64 cells

2 hours 20 minutes = 128 cells

2 hours 40 minutes = 256 cells

3 hours = 512 cells


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The perimeter of a rectangle swimming pool is 160 feet. The length of the swimming pool is four times its width . Find the dimen
Helga [31]
Formula for Perimeter of Rectangle:

P = 2(L + W)

Plug in 160:

160 = 2(L + W)

L = 4W
<span>So we can plug in '4W' for 'L' in the first equation.</span>
<span>160 = 2(L + W)

160 = 2(4W + W)

Combine like terms:

160 = 2(5W)

160 = 10W

Divide 10 to both sides:

W = 16

Now we can plug this back into any of the two equations to find the length.

L = 4W

L = 4(16)

L = 64

So the width is 16, and the length is 64.</span>
3 0
3 years ago
Read 2 more answers
19 ft 17ft 19 ft Volume =​
Elis [28]

Answer:

1,022.83 ft³

Step-by-step explanation:

volume= ⅓×½××19×17×19 = 1,022.83 ft³

3 0
3 years ago
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Rock-music sales represented 24.8% of the total music sales in 2000. By 2007, rock-music sales represented 32.4% of the total mu
baherus [9]

Answer:

Unit Rate of Change = 1.27%

Step-by-step explanation:

In 2000, t=1 and Total Music sales = 24.8%

In 2007, t=7 and Total Music sales = 32.4%

The Slope  m=\dfrac{32.4-24.8}{7-1} =\dfrac{7.6}{6}=1.27\%

The Unit Rate of Change is 1.27% and it means that the Total Music Sales Increased by approximately 1.27% every year.

8 0
3 years ago
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The sum of three numbers is 36. The first number is two times the second number, and the second number is
MakcuM [25]

Answer:

o (16, 8, 12)

Step-by-step explanation:

1st number: 8*2 =16

2nd number:12-4=8

3rd number: given

7 0
3 years ago
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The graph of f(x) = –3(x – 1)2 + 4 is shown on the left. Which interval defines the domain of the function? (-∞, 4) (-∞, 4] (-∞,
noname [10]

Answer:

C

Step-by-step explanation:

The graph can take any value of X

-3[ x^2 - 2x + 1] + 4

-3x^2 +6x -3 + 4

-3x^2 + 6x + 1

x can take any value of real numbers and there would be a solution

Hence all real numbers is the domain.

6 0
3 years ago
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