Aball is dropped from the top of a building that is 1,000 feet high. its height, in feet, as a function of the time, x, in seconds, after the ball was dropped, is given by the following equation, f(x) = 1,000 - 16x2. which set of numbers is appropriate as the domain for this function? a: natural numbers b: positive real numbers c: positive integers d: positive rational numbers

b

step-by-step explanation:

b. 2 and 4

step-by-step explanation:

answer: #1 ads up by 8 and i don't know #2

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)