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Karolina [17]
3 years ago
5

31.9/4 with estimate

Mathematics
2 answers:
melomori [17]3 years ago
6 0
You round 31.9 to 32 then divide it by 4 which gives you 8 for your estimate, and 31.9 divided by 4 is <span>7.975.</span>
stiks02 [169]3 years ago
5 0
The answer is 7.975
with estimate 8
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Hexagon DEFGHI is translated on the coordinate plane below to create hexagon D'E'F'G'H'I':
dem82 [27]
<span>Hexagon DEFGHI is translated on the coordinate plane below to create hexagon D'E'F'G'H'I'
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</span><span> d. (x, y)→(x + 7, y − 7)
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3 years ago
Trey evaluated 12/15 + 1/10 and got an answer of 13
bija089 [108]

Answer:

C. His answer is correct because 12 + 1 = 13 and 15 + 10 = 25.

Step-by-step explanation:

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3 years ago
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The population of the world was 7.1 billion in 2013, and the observed relative growth rate was 1.1% per year. A) Estimate how lo
VLD [36.1K]

Answer:

A) 63.36 years.

B) 100.42 years.

Step-by-step explanation:

We have been given that the population of the world was 7.1 billion in 2013, and the observed relative growth rate was 1.1% per year.

A) Since we know that population increases exponentially, therefore we will use our given information to form an exponential model for population increase and then we will solve for the time by which our population will be double.

P(t)=7.1(1.011)^{t}            

7.1 \times 2=7.1(1.011)^{t}  

\frac{7.1 \times 2}{7.1} =(1.011)^{t}

2 =(1.011)^{t}

Now let us solve for t using logarithm.

ln(2) =ln (1.011)^{t}      

ln(2) =t \cdot ln(1.011)

0.6931471805599453 =t \cdot 0.0109399400383344  

t=\frac{0.6931471805599453}{0.0109399400383344}

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B) Now we will find the number of years it will take the population to be triple of its size.

7.1 \times 3=7.1(1.011)^{t}

\frac{7.1 \times 3}{7.1} =(1.011)^{t}  

3 =(1.011)^{t}

Now let us solve for t using logarithm.        

ln(3) =ln (1.011)^{t}

ln(3) =t \cdot ln(1.011)

1.0986122886681097 =t \cdot 0.0109399400383344  

t=\frac{1.0986122886681097}{0.0109399400383344}

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6 0
3 years ago
Find the ratio of the area inside the square but outside the circle to the area of the square in the picture
Eduardwww [97]

Answer:

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Step-by-step explanation:

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The ratio of the area inside the square but outside the circle to the area of the square =  r²(4 - π) / 4r² = (4 - π) / 4 = 1 - π/4 = 0.2146

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