A rectangularNotebook has an area of (8x+20), what could be the 2 dimensions of it 10 Side 1
Side 2

Approximately 3.8 seconds

Step-by-step explanation:

H(x)=-16x^2+60x+4

We want to find when the ball hits the ground, or where the zeros are

0 =-16x^2+60x+4

Using the quadratic formula

-b ±sqrt(b^2 -4ac)

   2a

-60 ±sqrt(60^2 -4*-16*4)

   2(-16)

-60 ±sqrt(3600+256)

   -32

-60 ±sqrt(3856)

-32

We want the positive value for time

-60-62.09669879

  -32

3.815521837

Approximately 3.8 seconds