Einstein's special-relativity equation for the aging rate of an astronaut, Ra, relative to the aging rate of a friend on Earth, = R₁ √ ₁ - (7) ² R, is R₂ = R₁1- where v is the astronaut's speed and c is the speed of light. You are moving at 70% of the speed of light. Substitute 0.7c in the equation shown above. What is your aging rate relative to a friend on Earth? If 100 weeks have passed for your friend, how long were you gone? Your aging rate relative to a friend on Earth is (Round to two decimal places as needed.) R₁ (5.4.27)​