How many miles does the earth move around the sun each day?
If you prefer, start with the following:
The Earth's orbit is roughly circular (I know it's really closer to an ellipse, but it's good enough for an approximation).
The Earth travels around the Sun in about
The length of the Earth's path around the Sun in one year is about
#2pi * (9.3 xx 10^7) ~~ 5.84 xx 10^8#miles
Divide this by
#(5.84 xx 10^8) / 365 = 1.6 xx 10^6#miles.