The average distance from Mercury to the sun is approximately 5.79 × 10 7 km. If one kilometer is equal to about 6.68 × 10 –9 astronomical units, about how many astronomical units is the average distance from Mercury to the sun? Write your answer in scientific notation.

what i would say the best answer is a. 40.5

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!

see below

step-by-step explanation:

x+2> 6

subtract 2 from each side

x+2-2 > 6-2

x > 4

there is an open circle at 4 since is it is greater than and the line goes to the right

step-by-step explanation: