A. how many lines of symmetry does a regular polygon have? b. give a rule for the number of lines of symmetry in a regular polygon. in two or more complete sentences, justify the rule.

(a) calculate the molarity of a solution that contains 0.0345 mol nh4cl in 400 ml of solution. (b) how many moles of hno3 are present in 35.0 ml of a 2.20 m solution of nitric acid? (c) how many milliliters of 1.50 m koh solution are needed to supply 0.125 mil of koh ?

Find the area of a parallelogram with the given vertices. p(-2, -5), q(9, -5), r(1, 5), s(12, 5)

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air