Can anyone help me with this math puzzle? (whatever number answer you get for each question should be a number with one of the letters in the top right)

20points+brainliest

thank you :)

Asimple random sample of size nequals14 is drawn from a population that is normally distributed. the sample mean is found to be x overbar equals 70 and the sample standard deviation is found to be sequals13. construct a 90% confidence interval about the population mean

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then