A rocket is shot straight up from a 30-foot
rooftop with an initial velocity of 128 feet
per second. The height, h, of the rocket is
given by the equation h = -16t^2+ 128t+ 30,
where t is the time elapsed in seconds and h
is the height in feet.
a. How long will it take the rocket to
return to the ground?
b. The maximum height that the rocket
achieves is 286 feet. At what time does
it reach that height?

whose power in the senate is equal to the power of the speaker of the house?

step-by-step explanation:

not sure but it may be b, as i said i'm not sure.

the answer would be d.

step-by-step explanation:

move all variables to the left side and all constants to the right side

(x−3)^2+(y−1)^2=16

this is the form of a circle. use this form to determine the center and radius of the circle.

( x − h ) 2 + ( y − k ) 2 = r 2

match the values in this circle to those of the standard form. the variable   r   represents the radius of the circle,   h   represents the x-offset from the origin, and   k   represents the y-offset from origin.

r = 4

h = 3

k = 1

the center of the circle is found at   ( h , k ) .

center:   ( 3 , 1 )

these values represent the important values for graphing and analyzing a circle.

center:   ( 3 , 1 ).

radius:   4