A brand of cereal had 1.21.2 1.2 1, point, 2 milligrams (mg)(\text{mg}) (mg) left parenthesis, start text, m, g, end text, right parenthesis of iron per serving. Then they changed their recipe so they had 1.8 mg1.8\,\text{mg} 1.8mg 1, point, 8, start text, m, g, end text of iron per serving.

The percent increase in iron is 50 %.

Step-by-step explanation:

The percentage increase is given by

Firstly we find the increase or the difference in the amount of iron per serving as follows

Increase in iron per serving = Final iron content - Initial iron content

= 1.8 mg of iron - 1.2 mg of iron= 0.6 mg of iron

Next, we divide the increase by the initial or original iron content which is

1.2 mg of iron per serving

Hence  

Next, we multiply by 100 to get the value as a percentage,

That is 0.5 × 100 = 50 %

The percent increase in iron = 50 %.

answer: domain and range mean all possible values of x and y that could be substituted to the inequality. a solution means all possible values that make the inequality statement true. so while the range is still all real numbers, the solution is the shaded area, for which y will always be greater than the line of the function.