Answer:
13 seconds.
Step-by-step explanation:
Given

Required
Determine a reasonable solution for t
To do this, we equate h to 0.
becomes

Divide through by -4.9

Reorder the expression

Split
or 
This gives:
or 
But time can't be negative, So:

Answer:
C
Domain: {-2, -1, 1, 3}
Range: {-4, 0, 4, 6}
Step-by-step explanation:
The domain is the set containing all x-coordinates.
Domain: {-2, -1, 1, 3}
The range is the set containing all y-coordinates.
Range: {-4, 0, 4, 6}
Answer:
C
Domain: {-2, -1, 1, 3}
Range: {-4, 0, 4, 6}
If they're 8th grade or lower then sure.