To find out how many grams of iron Greg will consume in one week, we first need to calculate the total amount of iron he will consume per day and then multiply it by 7 (number of days in a week).
Each tablet contains 35 mg of iron, and he is taking two tablets per day, so the daily intake of iron is 35 mg x 2 = 70 mg.
To convert mg to g, we divide by 1000 (since there are 1000 mg in 1 g), so the daily intake of iron is 70 mg / 1000 = 0.07 g.
Therefore, the weekly intake of iron would be 0.07 g x 7 = 0.49 g.
Therefore, Greg will consume 0.49 grams of iron in one week.