Find the vault of each variable

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

In the diagram below, tan θ = sqrt 3. what is the value of m?

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?