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aliina [53]
4 years ago
14

Please help I'm stuck on these 2 problems would help so much!! Thanks!

Mathematics
1 answer:
Allisa [31]4 years ago
5 0
First
A. first one is the answer

second
-60 <= m ...first one is the answer
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In a certain country the life expectancy for women in 1990 was 45 and in 2000 it was 85?years. Assuming that life expectancy bet
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Answer:

49145 years

Step-by-step explanation:

In a certain country the life expectancy for women in 1990 was 45 and in 2000 it was 85?years.

Assuming that life expectancy between 2000 and 2100 increases by the same percentage as it did between 1900 and 2000,what will life expectancy be for women in 2100?

In 10 years, the expectancy increased by 85/45 = 17/9

between 2000 and 2100, it will increas by 10 time 10 years, so expected expectancy is  85*(\frac{85}{45})^{10} = 49145  years

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3 years ago
A metal plate, with constant density 5 g/cm^2, has a shape bounded by the curbe y = x^2 and the x-axis, with 0&lt;= x &lt;= 3 an
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area = integral 0 to 3 of x^2 dx = [1/3x^3] 0 to 3 = 9

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x = integral 0 to 3 of 5x^3 dx / mass = (405/4) / 45 = 9/4

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