An airplane is flying in a direction of 165 degrees with an airspeed of 650 mph. the wind is blowing at 50 mph in a direction of N 30 degrees E. what is the ground speed and direction of the plane?

And explain how you got it so i can understand future problems : 3

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

What are the solutions of the equation? 6x^2 + 11x + 4 = 0 a. 4/3, 1/2 b. -4/3, -1/2 c. 4/3, -1/2 d. -4/3, 1/2