Question 614424
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi, re TY, Note: typo correction in red. You are completely correct.  Good Work!
Difference between:
 4.51x10^9
 7.8x10^8
Put in 'Like' terms:
 45.1x10^8
<u> -7.8x10^8</u>
 {{{ highlight(37.3)}}}x10^8  OR 3.7x10^9 km