Answer:
2.16 s
Step-by-step explanation:
When it hits the ground, height h=0 hence



Using quadratic formula

Since time can't be negative, 
t=2.16 s
For this case we have an equation of the form:
Where,
A: original price
b: growth rate
x: number of years
Substituting values we have:
Answer:
the value of the antique clock, and, in dollars, after x years is:

Answer: D for the first one and B for the second
Step-by-step explanation:
Slope = (y2 - y1)/(x2 - x1)
Slope = (8 - 0)/(3 - 1)
Slope = 8/2
Slope = 4
Answer
4