Which expression is equivalent to this polynomial? x2 + 8 a. (x+2√2)(x-2√2)
b.(x+4i)(x-4i)
c.(x+2√2)²
d.(x+2√2i)(x-2√2i)

Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?

Does the point (1, sqrt 7) lie on circle shown.

Two poles, ab and ed, are fixed to the ground with the of ropes ac and ec, as shown: what is the approximate distance, in feet, between the two poles? 6.93 feet 8.66 feet 12.32 feet 15.59 feet