Aclinical test on humans of a new drug is normally done in three phases. phase 1 is conducted with a relatively small number of healthy volunteers. for example a phase 1 test of a specific drug involved only ate subjects. assume that we want to treat eight healthy humans with this new drug and we have 11 suitable volunteers available. if 8 subjects are randomly selected and treated at the same time, what is the probability f selecting the 8 youngest subjects?

good luck on your studies! : )

david edward.

hello from mrbilldoesmath!

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)

ur right ive taken the test

step-by-step explanation: