The brain volumes (cm cubed) of 50 brains vary from a low of 902 cm cubed to a high of 1478 cm cubed. Use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.2 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed. The brain volumes (cm cubed) of 50 brains vary from a low of 902 cm cubed to a high of 1478 cm cubed. Use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.2 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed.

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blogan.20174

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

discussion:

in general, the factorization of a^3 + b^3 is

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

in our case note that 343 = 7^3 and 216 = 6^3 so the equation becomes:

343x^3 + 216y^3 = (7x)^3 + (6y)^3

if you think of a (above) as 7x and b as 6y the factorization becomes

343x^3 + 216y^3 =

((7x + 6y) (   (7x)^2 - 7x*6y + (6y)^2)   =

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

you,

mrb

(a + b) (a^2 - a b + b^2)

i would say true? if the unit was informational and it "refreshed your understanding", then true.

p

step-by-step explanation: