What is the luminosity class (Supergiant I, Bright Giant II, Giant III, Sub-Giant IV, Main Sequence V) and spectral type (OBAFGKM) of a star with an effective temperature of 6000 K and a luminosity of 1 LSun?

4. find the geometric mean of 4 and 12. 24 8

Find the value of 1715⋅211.though these numbers aren't quite as nice as the ones from the example or the previous part, the procedure is the same, so this is really no more difficult. give the numerator followed by the denominator, separated by a comma.

The base of a triangle exceeds the height by 7 centimeters. if the area is 400 square centimeters, find the length of the base and the height of the triangle.