Assume That Earth Is a Sphere with a Radius of 4500

question 154

Multiple Choice

Assume that Earth is a sphere with a radius of 4500 miles.The center of Earth is placed at the origin of a three-dimensional coordinate system.What is the equation of the sphere?

• A) \(2 x ^ { 2 } + 2 y ^ { 2 } + 2 z ^ { 2 } = ( 4500 ) ^ { 2 }\)
• B) \(2 x ^ { 2 } + y ^ { 2 } + z ^ { 2 } = ( 4500 ) ^ { 2 }\)
• C) \(x ^ { 2 } + y ^ { 2 } + z ^ { 2 } = ( 4500 ) ^ { 2 }\)
• D) \(x ^ { 2 } + y ^ { 2 } + 2 z ^ { 2 } = ( 4500 ) ^ { 2 }\)
• E) \(x ^ { 2 } + 2 y ^ { 2 } + z ^ { 2 } = ( 4500 ) ^ { 2 }\)

---

Definitions:

AND

A logical operator in programming and mathematics that results in true if and only if all operands are true.

OR

A logical operation that yields true if any of its operands are true, commonly used in programming and digital logic.

Text Messaging

The act of sending brief, electronic messages between two or more mobile devices.

SMS

Short Messaging Service, a text messaging service component of most telephone, internet, and mobile-device systems.