NASA creates a weightless
environment by flying a plane in a series of
parabolic paths. The height h (in feet) of a plane
after t seconds in a parabolic flight path can be
modeled by the graph of h = -11t+ + 700t + 21,000.
The passengers experience a weightless environment
when the height of the plane is greater than or equal
to 30,800 feet. Find the period of weightlessness on such
a flight. Explain.

where did you get them? if you picked from the grass, is is probably poisonous.

step-by-step explanation:

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)

i dont know

step-by-step explanation:

system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.