An arch is 630 ft high and has 580=ft base. it can be modeled by the parabola =630\left [ 1-\left ( x/290 \right )^2 \right ]. find the average height of the arch above the ground.
the average height of the arch is ft above the ground.

420 ft

Step-by-step explanation:

The given equation of a parabola is

An arch is 630 ft high and has 580=ft base.

Find zeroes of the given function.

It means function is above the ground from -290 to 290.

Formula for the average height:

where, a is lower limit and b is upper limit.

For the given problem a=-290 and b=290.

The average height of the arch is

Substitute the limits.

Therefore, the average height of the arch is 420 ft above the ground.

your answer is the last one

step-by-step explanation:

divide the length of a'c' by the length of ac to get a scale factor of two

& then reflect vertically (over the y-axis)

so your answer is dilation by a scale factor of 2 followed by reflection over the y-axis

take it another