Which of the following ratios forms a proportion with 4/15 ?

To prove "p is equal to q" using an indirect proof, what would your starting assumption be?

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

What are the soultion(s) to the quadratic equation 40- x^2=0