Calculate the mean, the variance, and the standard deviation of the following discrete probability distribution. (negative values should be indicated by a minus sign. round intermediate calculations to at least 4 decimal places. round your final answers to 2 decimal places.)
x −28 −24 −9 −4
p(x = x) 0.42 0.30 0.20 0.08

answer: c

because if you look at the chart you can see a pattern and compare it to the question he simplify out your

but i think the formula is f(x)=6x

answer4 to the second power is 16

and 4 to the third power is 64,

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.

the answer is 13/48

step-by-step explanation: