Suppose mybook sent out 950 surveys. which of these numbers of surveys
being returned would prevent nonresponse bias?
o a. 190
ob. 9
o c. 950
o d. 95

An airplane is flying at an elevation of 5150 ft, directly above a straight highway. two motorists are driving cars on the highway on opposite sides of the plane, and the angle of depression to one car is 35 ̊ and to the other is 52 ̊. how far apart are the cars?