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defon
3 years ago
15

A culture started with 1,000 bacteria. After 2 hours, it grew to 1,100 bacteria. Predict how many bacteria will be present after

9 hours.
Mathematics
2 answers:
Agata [3.3K]3 years ago
7 0

Answer:

450

Step-by-step explanation:

Harrizon [31]3 years ago
6 0

Answer:

450 Bacteria

Step-by-step explanation:

First we need to consider the amount of bacteria that grew after two hours. Since 100 bacteria grew after 2 hours, we need to find how much bacteria grows per hour.

We can find that by dividing 100 by 2

100/2 = 50 Bacteria per hour

Now that we know how much bacteria grows per hour, we can then multiply that amount to the amount of hours asked in the problem.

9 hours x 50 Bacteria = 450 Bacteria in 9 hours.

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F(x) = 3x-6
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Please help. Thank you!
katrin2010 [14]

Answer:

3a. ⇒ 2700 cm³

3b. ⇒ 72,900 cm³

3c. ⇒ 27

Step-by-step explanation:

3a.

∵ The model in a shape of square pyramid

∴ Its volume = base area × height

∵ Base shaped square with side length 15 cm

∴ Area of base = 15 × 15 = 225 cm²

∵ The model height = 12 cm

∴ She needs = 225 × 12 = 2,700 cm³ of plaster

3b.

∵ Each dimension in the actual stage = 3 times the model

∴ The side of the square base = 15 × 3 = 45 cm

∴ The height = 12 × 3 = 36 cm

∴ The area of the base = 45 × 45 = 2,025 cm²

∴ She needs = 2025 × 36 = 72,900 cm³ of plaster

3c.

∵ Each length in the actual stage is 3 times the model

∴ The volume of the actual stage = (3)³ the volume of the model

∴ The volume of the actual stage = 27 the volume of the model

<em>To check your answer:</em>

Volume actual ÷ Volume model = 72,900 ÷ 2700 = 27

3 0
3 years ago
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Sidana [21]

Answer:

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Step-by-step explanation:

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3 years ago
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zheka24 [161]

Answer:

x=0.8

Step-by-step explanation:

-5x + 4= 0

       -4    -4

-5x=-4

÷5

-x=-0.8

x=0.8

6 0
3 years ago
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