Devin is asked to write out how to find the circumference of a circle. he writes:
"first measure the radius, then multiply that by 2, then multiply that answer by π, and that will give you the circumference."
which statement is another correct response?
a) first measure the radius then multiply that by π to find the circumference.
b) first measure the diameter then multiply that by π to find the circumference.
c) first measure the radius, then divide that by 2, then multiply that answer by π to find the circumference.
d) first measure the diameter, then divide that by 2, then multiply that answer by π to find the circumference.

Option B is correct

First measure the diameter then multiply that by π to find the circumference

Step-by-step explanation:

Circumference of a circle is given by:

or

where

C is the circumference of a circle

r is the radius of the circle

D is the diameter of a circle.

As per the statement:

He writes:

"First measure the radius, then multiply that by 2, then multiply that answer by π, and that will give you the circumference."

⇒

We know that:

Diameter of a circle(D) = 2r

then;

⇒First measure the diameter then multiply that by π, to get the circumference.

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