What is the length of segment BC

A. 6
B. 8
C. 10
D. 25

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?

What are the exclude value of mn+3m