2 if the sun is approximately 1.5 x 10" meters from Earth, what is the approximate distance from Earth to Mars

Lines a and b are parallel. what is the value of x? -5 -10 -35 -55

I’m still confused on how to work the percentages

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236