The answer is A ( need points)
The equation

<span>defines a hyperbolic cylinder.
</span>
1. Divide the equation

by 900:

.
This is the equation of conic section when z=0 (or z=const) and that is hyperbola equation.
2. To find the domain and the range you should express y:

.
Since you have square root,

. This is the domain, the range is

.
Answer:
37h−12
Step-by-step explanation:
(72h−35h)−12
37h−12
%change=100(final-initial)/initial
%change=100(17.43-21)/21
%change= -17%