Question

In scientific notation, the radius of the sun is _____ x 10 _____ kilometers.

a) 1.39, 6
b) 6, 1.39
c) 13.9, 5
d) 5, 13.9

Answer 1

a) 1.39 x 10^6 kilometers

Answer 2

The radius of the Sun expressed in scientific notation is 1.39 × 106 kilometers, following the convention that the coefficient should be between 1 and 10.

Step-by-step explanation:

The radius of the Sun in scientific notation is 6.957 × 105 kilometers. Coercing this into the standard format for scientific notation, where there's only one non-zero digit left of the decimal point, you'd write it as 6.96 × 105 kilometers, as it's approximately 695,700 km. Hence, the correct choice from the given options is 1.39 × 106 kilometers (a). Scientific notation requires the coefficient to be greater than or equal to 1 and less than 10, followed by the power of 10 that indicates how many places the decimal point has been moved.