The brightness of a star is called its absolute magnitude (m). the equation m = a + 5 - 5 log d is used to find the absolute magnitude of a star. a represents the apparent magnitude and d is the distance, measured in a unit called parsecs, from earth.

the absolute magnitude of a star is 0.45 and the apparent magnitude is 0.009, how far is the star from earth?

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

Find the multiplicative inverse of 8-12i

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.