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General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right  

Equality Properties

Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtraction Property of Equality

Geometry

Volume of a Cone Formula:

r is radiush is height

Step-by-step explanation:

Step 1: Define

Identify variables

V = 120π cm³

h = 10 cm

Step 2: Solve for r

Substitute in variables [Volume of a Cone Formula]:                                    Multiply:                                                                                                             [Division Property of Equality] Divide    on both sides:                      [Equality Property] Square root both sides:                                                    Rewrite:                                                                                                            

He will need 2,898 pieces of paper

Hope this ; )