-16t^2+400=0
16t^2=400
take square root on both sides.

4t=20
t=20/4
t=5
Answer:
I believe it is the last choice.
Step-by-step explanation:
Answer:

Step-by-step explanation:

Answer:
A 40%
Step-by-step explanation:
2/5 = 40/100 (or 40%)
So 40 blocks should be filled in :)
Hope this helps!
Answer:
94.7
Step-by-step explanation:
15.50+10*0.99*8