A model rocket is launched from the roof of a building. Its flight path is modeled by h = -5t^2 +30t +10 where h is the height of the rocket above the ground in
metres and r is the time after the launch in seconds.
What is the rocket's maximum height?

55

Step-by-step explanation:

This is the equation of a parabola. To make things simpler, we can replace with and with . Therefore, . Because the coefficient of the term is negative, we know the parabola points down, and the maximum height is the vertex. The x coordinate of the vertex of a parabola can be found with the equation , or . Plugging in into the equation gives us

the best buy, is the 4- kilogram bag of lollipops for $18.40.

step-by-step explanation:

i found my answer by dividing the cost of each bag by their respective weights.

14.88 divided by 2 = 7.44

17.29 divided by 3 = 5.77

18.4 divided by 4 = 4.6

24.4 divided by 5 = 4.88

by this, i found that the 4 kilo bag is the best buy.

the answer would be 150 books

step-by-step explanation:

if you divide 300 by 2 you will get 150