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Big Ideas Math: Modeling Real Life, Grade 8

BI

Big Ideas Math: Modeling Real Life, Grade 8 View details

2. Volumes of Cones

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Exercise 4 Page 437

Take the cube root of both sides of the equation.

x=3

Practice makes perfect

We want to solve the given equation. x^3=27 To do so, since x is raised to the third power, we will take cube roots on both sides. Let's do it!

x^3=27

sqrt(LHS)=sqrt(RHS)

sqrt(x^3)=sqrt(27)

SplitIntoFactors

Split into factors

sqrt(x^3)=sqrt(3* 3* 3)

ProdToPowThreeFac

a* a* a=a^3

sqrt(x^3)=sqrt(3^3)

RootPowToNumber

sqrt(a^3)=a

x=3

Subchapter links

Try It p.434-435

Self-Assessment for Concepts & Skills p.435

Self-Assessment for Problem Solving p.436

Review & Refresh p.437

Concepts, Skills, & Problem Solving p.437-438