An independent-measures study with n = 6 in each sample produces a sample mean difference of 4 points and a pooled variance of 12. what is the value for the t statistic?

Abiologist is recording the loss of fish in a pond. he notes the number of fish, f, in the pond on june 1. on july 1 there were 63 fish in the pond, which is 52 fewer fish than were in the pond on june 1. which equation represents this situation? a. f – 52 = 63 b. f – 63 = 52 c. 63 – f = 52 d. f – 63 = –52

Marya wants to factor the polynomial 36x^3 -22x^2 - 144x.which term can she add to the polynomial that would not change its grestest common factor? check all that apply

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?