(8.5H)Which situation represents 1 point
a proportional relationship?
The cost of purchasing hay for $26 a
bale with a delivery charge of $30.
The cost of purchasing baby chicks at
$4.50 per chick
The cost of purchasing fencing at $29
a linear foot with an installation fee of
$300.
The cost of renting a backhoe for $79
per hour with a non-refundable deposit
of $300.

Solution:

in a proportional relationship, one variable is always a constant value times the other.

y = kx

Where, k is a constant

Option 1

The cost of purchasing hay for $26 a  bale with a delivery charge of $30

Cost = $ 26 a bale + 30

This does not forms a proportional relationship

Option 2

The cost of purchasing baby chicks at  $4.50 per chick

Let "x" be the number of chicks

Therefore,

Thus, this forms a proportional relationship

Option 3

The cost of purchasing fencing at $29  a linear foot with an installation fee of  $300

cost = $ 29 a linear foot + 300

This does not forms a proportional relationship

Option 4

The cost of renting a backhoe for $79  per hour with a non-refundable deposit  of $300

cost = $ 79 per hour + 300

This does not forms a proportional relationship

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

c. 6tan80

step-by-step explanation: