At least 99.75 ​% of the data in any data set lie within how many standard deviations of the​ mean? Explain how you arrived at your answer. Explain how the number of standard deviations could be found for any data set. Choose the correct answer below.
Find the number of standard deviations.
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i will pick c put check it over to be sure

step-by-step explanation:

explanation:

step-by-step explanation:

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb