Understanding the Closure Property
Which of the following illusirates the closure property of addition of real numbers?
A. The sum of any two numbers is close to the product of those numbers.

B. The sum of any two numbers is close to the difference of those numbers.

C. When you add 1 to a number you get the next closest number.

D. The sum of any two real numbers is also a real number.

Option D:

The sum of any two real numbers is also a real number.

Solution:

Closure property of addition of real numbers:

Sum of any two numbers is also a real number.

i.e., a + b = c

If a and b are real, then c is also a real number.

To find which illustrates the closure property of addition of real numbers:

Option A:

The sum of any two numbers is close to the product of those numbers.

It is not true because it is addition property not product.

Option B:

The sum of any two numbers is close to the difference of those numbers.

It is not true because it is addition property not difference.

Option C:

When you add 1 to a number you get the next closest number.

It is not true by the above definition.

Option D:

The sum of any two real numbers is also a real number.

This is the closure property of addition of real numbers.

It is true.

Hence the sum of any two real numbers is also a real number.

Option D is the correct answer.

by definition, an arc subtended by a central angle of some given measure has the same measure. so .

answer: 42

use a calculator to find that 845/73 = 11.575

the whole part of the answer is 11. multiply this by 73 to get 11*73 = 803.

subtract that result from 845 to get 845 - 803 = 42