Can someone help me?

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

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much