9) 46
10) 4
11) 46
12) 5.8
13) 36
14) 34
15) 9
16) 56
Answer:
3 seconds
Step-by-step explanation:
When the ball hits the ground, the height will be 0. Therefore, you can substitute 0 in for the value of f(t), hence the equation will be:
0 = -16t^2 + 32t + 48
You can then factor out -16:
0 = t^2 - 2t - 3
Factor:
0 = (t-3)(t+1)
t = 3, -1
However -1 is an extraneous solution because time cannot be negative. Therefore, the answer is 3 seconds.
The answer is square root 5
Step-by-step explanation:
Answer:
1.715 kg
Step-by-step explanation:
343 m/s * 5 seconds = 1715 meters per second
Convert from m/s to kg by dividing by 1000
1715 meters per second / 1000 kilograms = 1.715 kg
Answer:
Step-by-step explanation:
I = k/d^2
65 = k/3^2
k = 585
I = 585/d^2
When d=2 meters, I = 146.25 watts/m^2
