If Tom and Abby specialize and then trade balls and rackets at 15 balls per 1 racket... A. Tom gains 10 balls while Abby gains 1 racket and 15 balls an hour

B. Tom gains 10 balls and Abby gains 10 balls an hour

C. Together they gain 80 balls and 4 rackets an hour

D. Tom gains 2 rackets while Abby gains 40 balls an hour

E. Tom gains 1 racket and 15 balls while Abby gains 10 balls an hour
  

At wind speeds above 1000 centimeters per second (cm/sec), significant sand-moving events begin to occur. wind speeds below 1000 cm/sec deposit sand and wind speeds above 1000 cm/sec move sand to new locations. the cyclic nature of wind and moving sand determines the shape and location of large dunes. at a test site, the prevailing direction of the wind did not change noticeably. however, the velocity did change. fifty-nine wind speed readings gave an average velocity of x = 1075 cm/sec. based on long-term experience, σ can be assumed to be 245 cm/sec. (a) find a 95% confidence interval for the population mean wind speed at this site. (round your answers to the nearest whole number.) lower limit cm/sec upper limit cm/sec