I need help with questions 1-3, Finding the area of a circle

What’s the domain of this function? fastttt

The weights of players in a basketball league are distributed normally. the distance (d) of each player's weight (w) from the mean of 86 kilograms was computed as follows: d = |w - 86| if d is greater than 7 for approximately 5% of the players, what is the approximate standard deviation of the players' weights? a. 1.75 kilograms b. 3.5 kilograms c. 4.3 kilograms d. 7 kilograms

Thelime contains the point(-3,0) and parallel x-3y=3( show all work)