Need on 15 plz answer fast and quick

In a school 2/3 of the students study a language of those who study a language 2/5 study french

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

If f(x)=x+7 and g(x)=1/x what is (fog)(x)