The luminosity of a star can be calculated by using the following equation. In the luminosity equation, represents the luminosity in watts, represents the radius of the star in meters, represents a constant equal to 5.67 × 10-8 Wm-2K-4, and represents the surface temperature in Kelvins.

What is the approximate radius of a star with a luminosity equal to 2.532 × 1021 W and a surface temperature of 3,000 K? (Use = 3.14)

(01.03 mc) which of the following is a step in simplifying the expression x multiplied by y to the power of 2 over x to the power of negative 3 multiplied by y to the power of 3, the whole to the power of negative 4. select one: a. x to the power of negative 4 multiplied by y to the power of negative 2, the whole over x to the power of negative 7 multiplied by y to the power of negative 1. b. x to the power of negative 4 multiplied by y to the power of negative 8, the whole over x to the power of 12 multiplied by y to the power of negative 12. c. x to the power of negative 4 multiplied by y to the power of negative 8, the whole over x to the power of negative 3 multiplied by y to the power of 3. d. x to the power of negative 4 multiplied by y to the power of negative 2, the whole over x to the power of negative 3 multiplied by y to the power of 3.