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3 years ago

Brainliest if correct Multiply 3/7 by 4/5

Mathematics

1 answer:

DiKsa [7]3 years ago

4 0

Answer:

Step-by-step explanation:

x1 / y1 times x2 / y2 where are two fractions

x1/y1 times x2/y2 = x1 times x2 / y1 times y2 = z1 / z2 z is a new fraction

fractions multiply like regular wholes number, which can also be represented in fractional form

Examples:

2/1 times 3/1 = 2x3 /1x1 6/1

10/2 x 18/3 = 180/6 now look at 10/2 = 5 18/3 = 6 5x6 = 30

5 x 6 = 30

Now apply to your fractions:

3/7 x 4/5 = 3x4 / 7x5

12/35

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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.

$ln(2) =ln (1.011)^{t}$

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

$0.6931471805599453 =t \cdot 0.0109399400383344$

$t=\frac{0.6931471805599453}{0.0109399400383344}$

$t=63.3593217267282743049\approx 63.36$

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

2 years ago

Learn with an example

malfutka [58]

Answer:

200

Step-by-step explanation:

1. 4 times 5 because there are 5 types in total and they make 4 of each type in each batch they bake. 4*5 is 20.

2. 20 times 10 because they make 10 batches and you know there are 20 in each batch. so 20 times 10 is 200.

200 is the answer.

4 0

2 years ago

What is the square root between which two intergers explain

Softa [21]

Answer:

I’m pretty sure the square root between two Integers is when you have a non perfect square root for example the square root of 92. Since it is not perfect you have to estimate it and you use a numeric line to do it so in this case the square root of 92 would have to go in between the nearest perfect square roots from both sides which are 81 and 100. In the line you would see it as 9 and 10 and you have to estimate the value which in this case would be about 9.6

Step-by-step explanation:

6 0

2 years ago

!ANSWER FAST! <br><br> !ANSWER FAST!<br><br> !ANSWER FAST!

Anna007 [38]

Answer:

Leo = NO

Paola = YES

Matthew = NO

Jasmine = YES

Step-by-step explanation:

Unit rate is .....1/3 = 1 hour

HOPE THIS HELPS

PLZZ MARK BRAINLIEST

8 0

3 years ago

Read 2 more answers

What’s the answer I need to do it

Anastasy [175]

Answer:

m = -1/2

Step-by-step explanation:

If you have any questions about the way I solved it, don't hesitate to ask me in the comments below =)

8 0

3 years ago