Arectangular box has length 19 inches, width 13 inches, and a height of 6 inches. find the angle between the diagonal of of the box and the diagonal of its base. the angle should be measured in radians.

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?

Math it's appreciated. (picture provided)