Someone help please, this is two parts but I only need the first part

Idont get this question can someone me solve it? ** the distance light travels in one second (1 light second) is about 1.86 ×10^5 mi. saturn is about 475 light-seconds from the sun. about how many miles from the sun is saturn..my guess is 8.83* 10^7 you so much

Simplify the expression 10/11(22z) + (a+5) -1

If rt is greater than ba, which statement must be true ?