Answer:
2.83 s
Step-by-step explanation:
We are given that

When a rock reached the ground then h(t)=0


Using quadratic formula





Time cannot be negative .Therefore, negative value of t can not be possible.
Hence, the rock takes 2.83 sec to reach the ground.
It may be a special right triangle which would make the angles 45, 45, and 90
X represents the price of the snack Hanna buys after each school day.
Answer:
There's nothing to answer to that question, can you be specific.
Step-by-step explanation:
Isn't it already in standard form?