Geometry help can someone please explain

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

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

Question 5 spring semester final exam math evaluate