Please help me this is my test for the review of all the math i learned

  cassidy wants to cut the yellow fabric into strips that are 0.3 yards wide. how many strips of yellow fabric can cassidy make? yellow fabric 16 yards for $108.00.

Arandom sample of 45 observations results in a sample mean of 68. the population standard deviation is known to be 23 a. compute the margin of error at a 959% confidence interval. b. compute the 95% confidence interval for the population mean c. compute the 90% confidence interval for the population mean. d. compute the 75% confidence interval for the population mean

Ineed with area of a circle a circular plate has a diameter of 6 inches. what is the exact area of the plate? a.3_ square inches b.6_ square inches c.36_ square inches d.9_ square inches