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tigry1 [53]
3 years ago
11

Factor: 3x^2 - 288y^2 - 36

Mathematics
2 answers:
erica [24]3 years ago
7 0

Answer:

3x^2-288y^2-36

Rewrite -36 as 12×3

Rewrite -288 as 96×3

3x^2+96.3y^2+12.3

factor out common term 3

=3(x^2-96y^2-12)

ZanzabumX [31]3 years ago
6 0

Answer:

3(x^2-96y^2-12)

Step-by-step explanation:

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The answer is 100 if you do it step-by-step
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A book drive recorded its daily results on a graph. The first five days are represented as points (1,8), (2,13), (3,13), (4,15),
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Suppose that E and F are two events and that N(E and F)=300 and N(E)=730. What is P(F|E)?
marin [14]

Answer:

\displaystyle\frac{30}{73}

Step-by-step explanation:

The formula of conditional probability is:

\displaystyle P(F|E)=\frac{P(E \cap F)}{P(E)}

And if we called N(U) the total number of possible outcomes, then remember by definition of probability:

\displaystyle P(E \cap F)=\frac{N(E \cap F)}{N(U)}\\\displaystyle P(E)=\frac{N(E)}{N(U)}

Then plugging them into the formula of conditional probability we get:

\displaystyle P(F|E)=\frac{\frac{N(E \cap F)}{N(U)}}{\frac{N(E)}{N(U)}}

Then we simplify and we get:

\displaystyle P(F|E)=\frac{N(E \cap F)}{N(E)}

We just plug the given info and we get:

\displaystyle P(F|E)=\frac{300}{730}=\frac{30}{70}

3 0
4 years ago
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}

t=63.3593217267282743049\approx 63.36

Therefore, it will take 63.36 years the population to be double.

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}

t=100.4221490079915311298\approx 100.42

Therefore, it will take 100.42 years the population to triple of its size.


6 0
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Find the volume and surface area of this cylinder
Yanka [14]

Answer: V≈2613.81 and

SA= 1055.5751316062 feet2

Step-by-step explanation:

For surface area just sum it down to 1055.57 feet2

3 0
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