Question

Scientists using the Hubble Space Telescope have observed Cepheids in the galaxy M 100. Here are the actual data for three Cepheids in M 100:
Cepheid 1: luminosity = 3.9×1030 watts, brightness 9.3×10−19watt/m2
Cepheid 2: luminosity = 1.2×1030 watts, brightness 3.8×10−19watt/m2
Cepheid 3: luminosity = 2.5×1030 watts, brightness 8.7×10−19watt/m2

Compute the distance to M 100 with data from each of the three Cepheids.

Express your answers using two significant figures. Enter your answers numerically separated by commas.

Answer 1