PLEASE HELP:))) Sacha buys a computer costing $1470 on her credit card. Her bank offers a 30-day statement period and then a further 10 days interest free. After that time, the bank charges interest at a rate of 18.5% per annum compounding daily. Sacha makes the purchase on 10 January, which is day 12 of her statement period. She intends to pay off the credit card on 1 March. At this date, how much will she need to pay back? (assume no interest is payable on the last day)

What is the volume of this square pyramid?

You are cycling around europe with friends. a cycling festival is starting soon in barcelona. it will take 4.5 hours to cycle there. how many minutes in total is this?

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.