Belinda works for 6 hours a day. she is paid after every 4 days of work. she has been working at her job for 32 days. she makes $280 each pay check. how much has belinda earned? (which information is not necessary to solve this problem? ) a. belinda makes $280 each pay check b. belinda has been working at her job for 32 days. c. belinda is paid after 4 days of work d. belinda works 6 hours each day. (15 pts)

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