Answer:
Third option is correct.
Step-by-step explanation:
The given model is
Where, h(t) is heigth of rock after time t (in seconds).
The initial height of rock is 124 ft.
The leading coefficient is negative. It means it is a downward parabola.
First we have to the x-intercepts of the function.
Using quadratic formula, we get
and
It means rock remains in the air between .
The value of t can not be negative, therefore rock remains in the air between .
Third option is correct.
Answer:
exact form: 8/3
decimal form: 2.6
mixed number form: 2 2/3
Step-by-step explanation:
I believe the answer is b because
y is the total time to wait.
the more employees working would reduce the time by -70 with a base time of 300