Vector u has a magnitude of 5 units and a direction angle of 75°, and vector v has a magnitude of 6units and a direction angle of 210°. what is the component form of the vector u+v

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