(please help!) The center of a circle is at the origin on a coordinate grid. The vertex of a parabola that opens upward is at (0, 9). If th circle intersects the parabola at the parabola's vertex, which statement must be true?

Describe all the numbers that when rounded to the nearest thousand are 645,000

There is diarrhea on the floor. what do i do? my mum gonna see that i diarrhea on the floor! * don't report, i'm serious! *

When keisha installed a fence along the 200 foot perimeter of her rectangular back yard, she left an opening for a gate.in the diagram below, she used x to represent the length in feet of the gate? what is the value? a. 10 b. 20 c. 25 d. 30