Ten samples of coal from a northern appalachian source had an average mercury content of 0.242 ppm with a standard deviation of 0.037 ppm. find a 95% confidence for the mean mercury content of coal from this source. round the answers to four decimal places. the 95% confidence for the mean mercury content of coal from this source is

True or false? a circle could be circumscribed about the quadrilateral below.

5x−4≥12 or 12x+5≤−4 can you with this problem

Use the following statements to write a compound statement for the conjunction or disjunction. then find its truth value. p: an isosceles triangle has two congruent sides. q: a right angle measures 90° r: four points are always coplanar. s: a decagon has 12 sides. a) a right angle measures 90° or an isosceles triangle has two congruent sides; true. b) a right angle measures 90° and an isosceles triangle has two congruent sides; true. c) a right angle measures 90° and an isosceles triangle does not have two congruent sides; false. d) a right angle measures 90° or an isosceles triangle does not have two congruent sides; true.