Use the rules for multiplication by powers 100 to calculate 20 x 100

Multiplication by a power of 10 requires only that you add the number of zeros indicated by the power. Multiplying by 100 = 10² will add 2 zeros on the right.

... 20 × 100 = 2000

Multiplying by 10⁰ will add 0 zeros on the right.

... 20 × 10⁰ = 20

1,150 give brainliest

step-by-step explanation

2r= 2300

r =1150

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.