Question

A certain star is 3.86×1093.86×109 km in diameter. What is the measure of its radius?

a. 1.93×1091.93×109 km

b. 3.86×1093.86×109 km

c. 7.72×1097.72×109 km

d. 1.0×1091.0×109 km

Answer 1

To find the radius of a star given its diameter, you divide the diameter by two. In this case, the radius would be 1.93×109 km.

Step-by-step explanation:

If we are given a diameter of a certain star as 3.86×109 km, to find the radius we would divide that number by two. The diameter is the full distance across the star, so the radius, being the distance from the center to the edge, would just be half of that. Therefore, the measure of its radius would be 1.93×109 km.