A rocket is launched from the ground. The quadratic function y=-16x2+56x models the rockets height in feet above the ground after x seconds. About how long is the rocket in the air

Therefore,

3.5 s long was the rocket in the air.

Step-by-step explanation:

Given:

A rocket is launched from the ground.

Height function for Rocket is given as

Where,

y = height in function with x as time in second

To Find:

How long is the rocket in the air, x =?

Solution:

Expression is given

So for time in air put y = 0 in above Expression

x cannot be negative

∴ x = 3.5 sec.

Therefore,

3.5 s long was the rocket in the air.

b.my answer is b.

brainliest

the multiples of 15 are 15, 30,45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195,   210, 225, 240, 255, 270, 285, 300, 315, 330, 345, 360, 375,   390, 405, 420, 435, 450, 465, 480, 495, 510, 525, 540, 555, 570, 585, 600, 615, 630, 645, 660, 675, 690, 705, 720, and 735.

the factors of 15 are 1, 3, 5, and 15.

hope that , fam!

-une, your fren : )