What is the area of the top surface of a circular manhole cover that has a radius of 30 centimeters? use 3.14 for pi.

The speed of a falling object increases at a constant rate as time increases since the object was dropped. which graph could represent the relationship betweent time in seconds, and s, speed in meters per second? speed of a falling object object over time

I’m which figure is point g an orthocenter

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.