Option C: The solution is 
Explanation:
The given expression is 
We need to solution of the given expression.
The solution of the given expression can be determined by adding the two expressions.
Let us remove the parenthesis.
Thus, we have,

Adding the like terms, we have,

Thus, the solution is 
Hence, Option C is the correct answer.
Answer: see table below
<u>Step-by-step explanation:</u>

From the information: v is 64 while c is 5
Differentiate the new equation h=-16
+ 64t + 5 to get
= -32t + 64.
no 13). At maximum height this derivative equals zero so: -32t + 64 = 0; -32t = -64; t=2.Hence ans is 2 secs
no 14). put t as 2 sec in the equation: h=-16
+ 64t + 5. This gives
h=-16(
) + 64(2) + 5; h=-64+128+5=69. Hence h is 69ft