90000 because you have to round up
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

.
So, you go to the y axis and find 40 meters on the graph. Then, you go across to find out that x (time in seconds) is 20 seconds. So, in 20 seconds Tom walks 40 meters.
Answer:
$66
Step-by-step explanation:
that's the answer I thinkkkk
That I 8 do you want to know how I got it from being the world best math slover