Question

I need Help please I need to finish a Unit test before I go camping at the ocean the question is, Find the prime factorization of the number 3,240.

2 x 3 (3x3x3x3) x 5 (5x5x5x5)
2 (2x2x2) x 3 (3x3x3x3) x 10
2 (2x2x2) x 3 (3x3x3x3) x 5
2 (2x2x2) x 3 (3x3x3x3x3) x 5

Answer 1

actually never mind I solved it but my new question is Find the GCF of the numbers 140 and 180.
20
90
30
10
I don't know what a GCF is

Answer 2

3,240
= 2 * 1620
= 2*2 * 810
= 2*2*2 * 405
= 2*2*2*3 * 135
= 2*2*2*3*3 * 45
= 2*2*2*3*3*3 * 15
= 2*2*2*3*3*3*3 * 5

Answer 3

thanks

Answer 4

don't know what a GCF is?
ever hear of google, or a dictionary?
It is the Greatest Common Factor -- that is, the largest integer which divides both numbers.
140 = 2^2 * 5 * 7
180 = 2^2 * 3^2 * 5
so the largest number which divides both is 2^2 * 5 = 20
140 = 20*7
180 = 20*9
and 7 and 9 have no other common factors