Write down an (in)equality which describes the solid ball of radius 3 centered at (7,1,−1). it should have a form like x2+y2+(z−2)2−4> =0, where you use one of the following symbols ≤,< ,=,≥,> .

Step-by-step explanation:

A ball is the solid inside a surface which is a sphere.

The equation of a sphere has the form:

Where (h,k,s) is the center and r is the radius.

When we plug the given center (7,1,-1) and radius 3 we get:

Then we turn this into an inequality: Since the ball is inside the surface we must use the symbol.

Then we just subtract 9 from both sides to get:

.

step-by-step explanation:

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step-by-step explanation:

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