Dados los siguientes vectores: A = 3i - 10j + 3k B = 2i - j + 6k y C = 11i + 2j. Realizar las siguientes operaciones:
a)1.- A+B+C 2.- A-C 3.- C-B
b)Producto punto 1.- A. B 2.- A. C 3.-B. C
c) Producto cruz entre1.- BxC 2.- AxB
d) Encuentra los angulos entre 1.- A y B 2.- A y C 3.- B y C

(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 ?

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics

Geometry in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.