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vladimir2022 [97]
3 years ago
14

Suppose that the amount of algae in a pond doubles every 4 hours. If the pond initially contains 50 pounds of algae, how much al

gae will be in the pond after 12 hours?​
Mathematics
2 answers:
Igoryamba3 years ago
5 0

Answer:

There will be 800 hundred pounds.

Step-by-step explanation:

First 4 hrs doubles do goes up to 100.

After 4 more hours, 100 doubles so now we are at 200.

After 4 more hours, 200 doubles so now we are at 400

After 4 more hours, 400 doubles so now we are at 800.

Alll 12 hrs have gone by and we are at 800.

777dan777 [17]3 years ago
3 0

Answer:

400 pounds

Step-by-step explanation:

there is 3 groups of 4 in 12, so 50 x 2 = 100, that's once, 100 x 2 is 200. 200 x 2 is 400, so there's 400 pounds.

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LenKa [72]
The volume is given as V = Lwh = 20 m^3.
Since the base is a square then V = L²h = 20 m^3
Rearranging, we have L = √(20/h).

For the metal frame:
8√(20/h) + 4h ==> [8 is multiplied to √(20/h) because there are 8 sides measuring L, and 4 is multiplied to h because there are 4 sides that have measure h.]

9[8√(20/h) + 4h]
=72√(20/h) + 36h = Cost of metal frame

For the glass:
Area of one square base = L² = 20/h
Area of one rectangular side = h√(20/h) 
Area of 4 rectangular sides = 4h√(20/h) 

10[20/h + 4h√(20/h)] = Cost of glass

C = 72√(20/h) + 36h + 10[20/h + 4h√(20/h)] 

(take note, we did not multiply 10 to the terms because 10 dollars is per unit area and not unit length.)
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4 years ago
Given the set of data below, which measure(s) will change if the outlier is removed? (Check all that apply.) 1,6,8,8,8
Tom [10]
The diameter of a circle measures 12 yd what is the Circumference some of the circle? Use 3.14 for n
6 0
3 years ago
What is –3 2/3 · (–2 1/4 )?
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-3\frac{2}{3}\cdot\left(-2\frac{1}4{}\right)=\\--------------------\\negative\ number\ multiply\ by\ negative\ number\ is\ a\ positive\ number\\--------------------\\-3\frac{2}{3}\cdot\left(-2\frac{1}4{}\right)=3\frac{2}{3}\cdot2\frac{1}{4}=\\------------------------------\\

if you want to multiply mixed numbers you need to turn them into improper fractions

3\frac{2}{3}\cdot2\frac{1}{4}=\frac{3\cdot3+2}{3}\cdot\frac{2\cdot4+1}{4}=\frac{9+2}{3}\cdot\frac{8+1}{4}=\frac{11}{3}\cdot\frac{9}{4}=\frac{11}{1}\cdot\frac{3}{4}=\frac{11\cdot3}{1\cdot4}\\\center\boxed{=\frac{33}{4}=8\frac{1}{4}}

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3 years ago
The ratio of the side length of a square to the square's perimeter is always 1 to 4.
makvit [3.9K]

Answer:

Side length of square (inches): 1 ,2, 4, 7

Perimeter of square (inches). : 4, 8, 16, 28

Step-by-step explanation:

Ratio is 1:4 (S:P).

So:

#:8, #=2. This is because 2/8 and 1/4 both = 0.25.

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7 0
2 years ago
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crimeas [40]

Answer:

0.6 - 1/4

Convert the decimal to fraction

Thus

0.6 = 3/4

3/5 - 1/4

Find the LCM

the LCM is 20

We get

3/5 - 1/4 = (3(4) - 5)/ 20

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Find the LCM

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Thus

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Convert the decimal to fraction

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Thus we get

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Find the LCM

The LCM is 12

Thus

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= 21 - 2 / 12

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Convert the decimal to fraction

2.125 = 17/8

Thus

3/10 + 17/8

Find the LCM

the LCM is 40

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= 97 /40 or 2 17/40

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3 years ago
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