If an estimator is unbiased, then A. the estimator is equal to the true value. B. the mean of the estimator is usually close to the true value. C. the mean of the estimator is equal to the true value. D. the estimator is usually close to the true value.

∠aed is formed inside a circle by two intersecting chords. if minor arc bd = 70 and minor arc ac = 180, what is the measure of ∠ aed? a) 45° b) 50° c) 55° d) 60°

Which composition of similarity transformations maps polygon abcd to polygon a'b'c'd'? a dilation with a scale factor less than 1 and then a reflection a dilation with a scale factor less than 1 and then a translation a dilation with a scale factor greater than 1 and then a reflection a dilation with a scale factor greater than 1 and then a translation

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?