Pre-Algebra Examples

 $\begin{array}{r} r = & 1.5 \end{array}$

Step 1

The surface area of a sphere is equal to $4$ times Pi $π$ times the radius squared.

$4 π \cdot {(r a d i u s)}^{2}$

Step 2

Substitute the value of the radius $r = 1.5$ into the formula to find the surface area of the sphere. Pi $π$ is approximately equal to $3.14$ .

$4 \cdot π \cdot {1.5}^{2}$

Step 3

Raise $1.5$ to the power of $2$ .

$4 π \cdot 2.25$

Step 4

Multiply $4 π \cdot 2.25$ .

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Step 4.1

Multiply $2.25$ by $4$ .

$9 π$

Step 4.2

Multiply $9$ by $π$ .

$28.27433388$

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