Abrand 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. what was the percent increase in iron? %\% %

The percent increase in iron is 50 %.

Step-by-step explanation:

We know that the initial value of iron in a brand of cereal is 1.2 mg of iron per serving and the new value is 1.8 mg of iron per serving.

To find the percentage change in iron you must:

1. Subtract the initial value from the new value:

2. Divide that change by the initial value

3. Convert that to a percentage (by multiplying by 100 and adding a "%" sign)

The percent increase in iron is 50 %.

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt