What is the mode of the following numbers?
3, 5, 6, 7, 9, 6, 83,5,6,7,9,6,8

(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 ?

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

What is sin 7x/4 ? i need on this urgent trig