A Star Is Moving Towards the Earth with a Speed

question 50

Multiple Choice

A star is moving towards the earth with a speed at 90% the speed of light.It emits light,which moves away from the star at the speed of light.Relative to us on earth,what is the speed of the light moving toward us from the star?

• A) 0.90c
• B) c
• C) 1.1c
• D) 1.20c
• E) 1.9c

---

Definitions:

Greatest Common Monomial Factor

The highest monomial that divides two or more monomials without a remainder, used to simplify expressions by factoring it out.

Polynomial

A mathematical expression of finite length that involves only the operations of addition, subtraction, multiplication, and non-negative integer exponents of variables.

Negative Real Number

A real number that is less than zero, located to the left of zero on the number line.

Standard Form

Refers to a way of writing numbers to ensure consistency, often as a particular way of writing algebraic equations or complex numbers.