Mathematics, 19.08.2019 12:30 shippo

a rectangular field has a perimeter of 500m and an area of 14400m2. find the lengths of the sides

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Answer from: marquez8

Perimeter = 500 = 2x + 2y, where x and y are the length and width

area = 14400 = xy
x = 14400 / y

substitute:
500 = (2* (14400/y)) + 2y
[multiply by y]
500y = 28800 + 2y^2
2y^2 - 500y + 28800 = 0
y^2 - 250y + 14400 = 0

use the quadratic equation: y = (-b ± (b^2 - 4*a*c)^1/2) / 2a
the answers should be written in the form (y - answer one) (y- answer two)

substitute these answers into x = 14400 / y to find x
remember x and y can not be negative as they are lengths

Answer from: Quest

W-14=t. that i think is the answer idk

Answer from: Quest

step-by-step explanation:

i found the life tables for the year 2012.

life table of males at age 30. probability of dying between ages x and x+1

total population:

29–30 . . . . . . . . . . . . 0.001030

30–31 . . . . . . . . . . . . 0.001061

males:

29–30 . . . . . . . . . . . . 0.001420

30–31 . . . . . . . . . . . . 0.001448

white population

29–30 . . . . . . . . . . . . 0.001005

30–31 . . . . . . . . . . . . 0.001037

white males

29–30 . . . . . . . . . . . . 0.001372

30–31 . . . . . . . . . . . . 0.001399

non hispanic white population

29–30 . . . . . . . . . . . . 0.001083

30–31 . . . . . . . . . . . . 0.001116

non hispanic white males

29–30 . . . . . . . . . . . . 0.001477

30–31 . . . . . . . . . . . . 0.001503

jacob, non hispanic white male. 30 years old.

probability that jacob lives to be 30 years old.

since the given probabilities are probabilities of dying, i think we simply subtract it from 1 to get the probability of living. we will use the probability of non hispanic white male.

probability of living to be 30 y.o.

29 - 30 : 1 - 0.001477 = 0.998523

30 - 31 : 1 - 0.001503 = 0.998497

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a rectangular field has a perimeter of 500m and an area of 14400m2. find the lengths of the sides

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