Which is the equation of a hyperbola with directrices at x = ±2 and foci at (4, 0) and (−4, 0)? A) x^2/8 - y^2/8 = 1

B) x^2/8 - y^2/16 = 1

C) y^2/8 - x^2/8 = 1

D) y^2/16 - x^2/8 = 1

Find the value of the variable and the length of each secant segment

which of the following sets of data would produce the largest value for an independent-measures t statistic? the two sample means are 10 and 20 with variances of 20 and 25 the two sample means are 10 and 20 with variances of 120 and 125 the two sample means are 10 and 12 with sample variances of 20 and 25 the two sample means are 10 and 12 with variances of 120 and 125

Which questions would most a reader identify the author's purpose for writing? check all that apply. what type of text is this? what type of reviews did the book receive? how many copies of the book have been sold? what is the central idea? how does this text make one feel?