When the Nelsons sold their house they paid the realtor a fee of 6% of the selling price. If the house sold for
$180,000, how much was the realtor's fee?

$10,800

Step-by-step explanation:

If the house was sold for 180,000, we must find 6% of that.

6% = 0.06

180,000 x 0.06 = 10,800

The realtor's fee was $10,800

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.