The radius of the circle is 9 meters what is the circles circumfrence

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

How many solutions does the nonlinear system of equations graphed below have?

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)