Which shows the number 28 factored into prime numbers?

A.
4 · 7

B.
1· 2 · 2 · 7

C.
2 · 2 · 7

D.
3 · 7

Question

Which shows the number 28 factored into prime numbers?
 
 A.
4 · 7
 
 B.
1· 2 · 2 · 7
 
 C.
2 · 2 · 7
 
 D.
3 · 7

lifeisadangerousgame · Answer

The definition of prime means that the you can only get the number by multiplying itself by 1. For instance 2: You can only get two by multiplying 1 and 2 together. So which provided answer fits that definition AND equals 28 once you multiply it out?

anonymous · Answer

sorry doun't understand

lifeisadangerousgame · Answer

It's okay! Let's make a factoring tree.

28 is the number you start with. |dw:1442605156919:dw|