Answer:

General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Equality Properties
- Multiplication Property of Equality
- Division Property of Equality
- Addition Property of Equality
- Subtract Property of Equality
<u>Algebra I</u>
- Solving quadratics
- Multiple roots
<u>Algebra II</u>
- Logarithms
- Euler's number e
Step-by-step explanation:
<u>Step 1: Define</u>

<u>Step 2: Solve for </u><em><u>x</u></em>
- Raise both sides by e:

- Simplify equation:

- Square root both sides:

The factors of 45 are:
1, 3, 5, 9, 15, 45Which numbers multiply together to equal 45?
Answer:
10
Step-by-step explanation:

Hey!
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Solution:
I would assume that the iron intake is combined between breakfast and lunch. So 8.25mg is too meals worth of iron. So all we have to do is subtract.
15 - 8.25 = 6.75
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Answer:
6.75mg are still needed for his daily intake.
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Hope This Helped! Good Luck!