I need serious help . Evaluation of functions, please assist if you’re reading this.

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

Which is equivalent to 10/12? options: 10/18 5/6 3/12 9/11

What is the definition of exponential decay?