The ratio of the number of pencils that isaac has to the number of pencils that pablo has is 2: 7. together they have 72 pencils. how many pencils does isaac have?

If you divide 72 by 9 (both sides of the ratio added together) you get 8. if you multiply 8 to both sides of the ratio 2:7 you get 16:56. if you add 16 and 56 together, you will receive 72. Therefore, Isaac has 16 pencils

B. 2 1/2 feet. multiply 2.5 inches by 12 to get thirty inches then divide by 12 to get 2.5 feet