. (Sec. 7.4) The amount of lateral expansion (mils) was determined for a sample of n = 10 pulsed-power gas metal arc welds used in LNG ship containment tanks. The resulting sample standard deviation was s = 2.81 mils. (a) Assuming normality, derive a 99% CI for σ 2 and for σ. (b) Assuming normality, derive a 99% upper confidence bound for σ 2 and for σ.

The system of equations graphed below has how many solutions? y = 2x + 2

Which of the following describes the symmetry of the graph of y = x3?

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.