Bob invests $20 000 at 5% per annum compound interest compounded half-yearly. find the amount that he has at the end of 3 years. pls beg

Anyone know? will mark brainliest if you're correct!

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0

The architect's side view drawing of a saltbox-style house shows a post that supports the roof ridge. the support post is 8 ft tall. the distance from the front of the house to the support post is less than the distance from the post to the back of the house. how far from the front of the house is the support post positioned?