5 pairs of numbers
(1, 12)
(2, 12)
(3, 12)
(4, 12)
(3, 4)
This is an A. <span>observational study. They are observing the use of cell phones differs between people with or without cancer.
Happy studying ^-^</span>
You always either divide the equation or multiply the equation
hope this helps
3
We found the factors and prime factorization of 9 and 12. The biggest common factor number is the GCF number. So the greatest common factor 9 and 12 is 3.