The height of a fireworks rocket launched from a platform can be approximated by h=-5t+ 30t +35, where h is the height in meters and t is the time in seconds. Find the time it takes the rocket to reach the ground after it is launched.

Step-by-step explanation:

h=-5t+ 30t +35, where h is the height in meters and t is the time in seconds.

Considering the fact that the launched Rocket will hit the ground, it implies that the height will be zero. Hence the equation will be .

0 =-5t+ 30t +35

-5t+30t = -35

25t = -35

To find t, divide both sides by 25

25t/25 = -35/25

t = - 7/5

t = -1.4secs

Hence the time for the launched rocket to hit the ground will be -1.4secs

walter needs to make at least 5 more cookies but no more than 40. 5 ≥ x ≥ 40;

step-by-step explanation:

walter has to make a minimum of 20 cookies. he already has 15 cookies made, so he must make 5 more to meet the minimum.

the maximum amount of cookies he can make is 55. he already has 15, so he has to make no more than 40 more cookies to meet the maximum.