Experimental versus theoretical probability. someone me

Average salary for a medical assistant is $31,220 which is a 20% income tax bracket how much money would they pay in income tax?

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

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