Asimple random sample has a sample size of n=65. given the population is normally distributed, find the critical value t a/2 corresponding to a 99% confidence level

Which of the following is the shape of a cross section of the figure shown below

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?

72 the length of a side of a triangle is 36. a line parallel to that side divides the triangle into two parts of equal area. find the length of the segment determined by the points of intersection between the line and the other two sides of the triangle.