Kajal holds a ruler in some wavy water. The depth of the water t seconds after she measuring it, in cm, is given by D(t)=50-23sin(π(t+0.23))
After she starts measuring, when is the first time the depth of the waves is at its average value? Give an exact answer.
When t= ___ seconds.

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