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Montano1993 [528]
3 years ago
13

If there are initially 5000bacteria in a culture,and the number of bacteria doubles each hour,the number N of bacteria after t h

ours can be found using the formula N = 5000 [2 t ^]. About how long will it take the culture to grow to 40000 bacteria?

Mathematics
1 answer:
nikdorinn [45]3 years ago
7 0

Answer:

3 hours

Step-by-step explanation:

3 hours as it takes 3 periods to be 40000

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7 1/8 x 2 as a mixed number in simplest form
Flura [38]
You see, I'm not a fraction pleb. I do it decimal way.
Ok, fine I will.
7 1/8 = 57/8
57/8 x 2/1 = 114/8
This can be simplified to 57/4, 14 1/4, or 14.25
4 0
3 years ago
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A store sells two kinds of candles,scented candles and unscented candles. The candles burn at different rates which kind of cand
hoa [83]

Step-by-step explanation:

The first thing we must observe is that the hourly rate for each candle is:

<em />

<em>scented candles: </em>

(1/12) / (20/60)

Simplifying:

= (1/12) / (10/30)

= (1/12) / (5/15)

= (1/12) / (1/3)

= (3/12)

= (1/4) inches / hour

<em>Unscented candles: </em>

(1/6) / (30/60)

Simplifying:

= (1/6) / (15/30)

= (1/6) / (3/6)

= (1/6) / (1/2)

= (2/6)

= (1/3) inches / hour

Answer:

The unscented candles burn faster at a rate of:

(1/3) inches / hour.

5 0
3 years ago
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Mark recorded the growth of a plant over 8 weeks. The equation y=0.2x+2 represents the height y, in inches, after x weeks.
bezimeni [28]

The statements could be true are:

The height of the plant after week 3 was about 2.6 inches. ⇒ A

The height of the plant after week 9 was about 3.8 inches. ⇒ C

Step-by-step explanation:

Mark recorded the growth of a plant over 8 weeks

The equation y = 0.2x + 2, represents the height y, in inches, after x weeks

From the equation

  • 0.2 represents the rate of increasing of the height of the plant per week
  • 2 represents the initial height of the plant

∵ y represents the height of the plant after x week

∴ x is the number of the weeks

∵ y = 0.2x + 2

∵ x = 3

- Substitute x in the equation by 3

∴ y = 0.2(3) + 2

∴ y = 0.6 + 2

∴ y = 2.6

∴ The height of the plant after 3 weeks is 2.6 inches

∵ x = 9

- substitute x by 9 in the equation

∴ y = 0.2(9) + 2

∴ y = 1.8 + 2

∴ y = 3.8

∴ The height of the plant after 9 weeks is 3.8 inches

The statements could be true are:

The height of the plant after week 3 was about 2.6 inches.

The height of the plant after week 9 was about 3.8 inches.

Learn more:

You can learn more about the linear equations in brainly.com/question/1284310

#LearnwithBrainly

5 0
3 years ago
Order of operations
timurjin [86]

Answer:

z+9(8−x)+8(z+8)=

z+72-9x+8z+64=

9z-9x+136

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(3−10)^2−(5−12)^2     parenthesis first

(-7)²-(-7)²=

49-(49)=49-49=0

<u>                                                                       </u>

2^2⋅4^3      exponent first

2*2*4*4*4

4*64=256  

6 0
3 years ago
Sam has 36 pieces left to complete a puzzle. He has already put together 414 pieces. How many pieces p are in the puzzle? Write
dsp73

Answer:

450

Step-by-step explanation:

414+36=450

414+36=450p

7 0
3 years ago
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