Please help meee (20 points)

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?