The graph is shown below.
To determine the time it takes for boulder to reach its maximum height, derive the equation and equate to zero.
h = -16t² + 112t + 30
dh / dt = 0 = -32t + 112
The value of t from the equation above is 3.5 s. Substitute this value of t to the original question,
h = -16(3.5 s)² + 112(3.5 s) + 30 = 226 ft
Thus, the answer is letter D.
Answer:
percentage of 0.9% of 1,000
Z and 3z
because both terms contain the same variable, they can be combined to make 4z or 2z. By combining like terms, you simplify the problem set, whereas 2a and 3z can't be simplified, since their sum is just 2a+3z