The attendance qt a seminar in a year 1 was 500 in year 2 the attendance changed by 100 what was the percent change in attendance?

Aplanet of mass m 6.75 x 1024 kg is orbiting in a circular path a star of mass m 2.75 x 1029 kg. the radius of the orbit is r 8.05 x107 km. what is the orbital period (in earth days) of the planet tplanet?

In an experiment, how can i change human errors? be specific.

You can decrease the resistance of a length of wire by