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max2010maxim [7]
3 years ago
12

In a certain​ country, the life expectancy for women in 1900 was 4949 years and in 2000 it was 8181 years. Assuming that life ex

pectancy between 2000 and 2100 increases by the same percentage as it did between 1900 and​ 2000, what will the life expectancy be for women in​ 2100?
Mathematics
1 answer:
Phantasy [73]3 years ago
4 0

Answer:

The life expectancy for 2100 will be 134 years.

Step-by-step explanation:

Consider the provided information.

In 1900 women life expectancy was 49 years and in 2000 it was 81 years.

First calculate the difference of life expectancy between 1900 to 2000.

81-49=32 years

Percentage change is:

\text{Percentage change}=\frac{32}{49}\times 100\approx65.31

It is given that the increase in percentage remains same.

Therefore, next year life expectancy will be:

\begin{aligned}81+65.31\% \times81&=81(1+\frac{65.31}{100})\\&=81(1.6531)\\&=133.9011\approx134\end{aligned}

Hence, the life expectancy for 2100 will be 134 years.

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Use elimination to solve each system of equations.<br><br> 1. 3x+4y=29<br> 6x+5y=43
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Answer:

Step-by-step explanation:

3x+4y=29 .......(1)

6x+5y=43 .......(2)

Multiply equation (1) by 2

6x + 8y = 58......(3)

Substracting (2) from (3)

8y - 5y = 58 - 43

3y = 15

Dividing by 3

3y/3 = 15/3

y = 5

Substituting y = 5 into (2)

6x+5y=43

6x + 5(5) = 43

6x + 25 = 43

6x = 43 - 25

6x = 18

Dividing by 6

6x/6 = 18/6

x = 3

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2 years ago
$3.50 for 1/2 pound of cheese whats the cost for 1 pound
jeka57 [31]

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7 dollars

Step-by-step explanation:

Because 1/2 a pound is half of 1 pound and 3.50 is the value of half that pound, you can add 3.50 to 3.50 to get 7 dollars which is the value for 1 pound

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What is the roots of decimals and fractions
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3 years ago
What is the equation in point slope form, for a line that goes through (7, -8) and (-4, 6) brainly
Anika [276]

Answer:

The equation of the line is y - 6 = -14/11(x + 4)

Step-by-step explanation:

To find the equation of this line, we first need to find the slope. To do that, we use the slope equation.

m(slope) = (y2 - y1)/(x2 - x1)

m = (6 - -8)/(-4 - 7)

m = (6 + 8)/(-4 - 7)

m = 14/-11

m = -14/11

Now that we have the slope, we can use it and either point in point-slope form and solve for the equation.

y - y1 = m(x - x1)

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2 years ago
The American Veterinary Association claims that the annual cost of medical care for dogs averages $100 with a standard deviation
Taya2010 [7]

Answer:

The probability that the cost for someone's dog is higher than for the cat is 33.2%.

Step-by-step explanation:

With the data given, we know that the difference in cost of medical care of dogs and cats have a normal distribution with μ=-20 and σ=46.

To know the probability of the cost for the dog is higher than the cat, we have to calculate the probability of P(d>0).

Then we have to calculate z, and look up in a standarized normal distribution table.

Calculate z:

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The probability of the difference being higher than 0, we have:

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We can say that the probability that the cost for someone's dog is higher than for the cat is 33.2%.

8 0
2 years ago
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