The average diameter of the orbit of the earth around the sun is 2992 km.
a) find the radius in kilometers in the form ax10^k where 1 ≤a < 10.
b) round the measurements to 2sf. keep answers in scientific notation for parts b-d
c) it takes one year for the earth to complete one full orbit. assuming the orbit is a circular path, calculate the distance in km that the earth travels in one orbit around the sun
d) today’s is mary’s 17th birthday. calculate the total distance that he has travelled around the sun since being born accurate to 2sf.