Answer:
-1/5, 5/10, 0.25, 10.5
Step-by-step explanation:
Answer:
(1/3)^2 m^2
Step-by-step explanation:
Because Area of square = A = x*x
here x = 1/3 m.
so A = (1/3 m)*(1/3 m) = (1/3)^2 * m^2
Answer:
The pebble will hit the ground 8.29 second after it is thrown.
Step-by-step explanation:
Given that,
The height of the pebble after t seconds is given by the equation
h= -16t²+24 t+900.
When the pebble hit the ground, the height of the pebble will be zero.
So putting h=0 in the given equation.
0 = -16t²+24 t+900
⇒-4(4t²-6t-225)=0
⇒4t²-6t-225=0
Applying quadratic formula
, here a=4, b= -6 and c= -225.

⇒ t = 8.29, -6.79
Since time can not negative.
∴t=8.29 seconds.
The pebble will hit the ground 8.29 second after it is thrown.