Joan kicked a soccer ball. The height of the ball, h, in metres, can be modelled by h =-1.2x^2 + 6x , where x is the horizontal distance, in metres, from where she kicked the ball.

7.5m

Step-by-step explanation:

Since we are not asked what to look for we can find the maximum height reached by the ball

The ball reaches its maximum height when dh/dx = 0

dh/dx = -2.4x + 6

0 = -2.4x + 6

2.4x = 6

x = 6/2.4

x = 2.5

Get the max height

Recall:

h =-1.2x^2 + 6x ,

h(2.5) = -1.2(2.5)^2 + 6(2.5)

h(2.5) = -1.2(6.25)+15

h(2.5) = -7.5 + 15

h = 7.5

Hence the maximum height reached by the ball is 7.5m

Assuming question is asking for how many days Margo has had the tree, we can easily find "how much the tree have grown since Margo bought it?"

She bought when it was 5 cm and now after some days, it is 65 cm. So the tree grew by cm.

If each day, it grows 2.5 cm, how many days does it take for it to grow 60 cm?

We divide 60 by 2.5 to get 24.

days

ANSWER: 24 Days