Dan's science magazine has a mass of 256.674 grams. what is the mass of his magazine rounded to the nearest tenth?

The answer is 256.7

You round the .67 off to .7

The .6 in 256.674 is in the tenth place. You are rounding off that number. If the number next to it is greater then 5, you round up. If it's less then 5 you keep it the same.

The tenth place is the .6. Look over at the number next to it, the 7. It's greater than 5 so make the .6 one digit greater. Now your answer is 256.7

The answer to your question is b’(16,14)