The angle is a 90 degree angle.
The height of the ball initially is 54 inches. The common ratio has been provided which is 0.750.
The explicit formular for the geometric sequence is shown as;

The explicit formula is shown as;
54 x (0.750)^9
The rest is simply to solve for the height on the 10th bounce
IM pretty sure the answer is
1.A
2.C
3.A
4.D
5.B
:)
No because 7/9= 0.777777777789 and 8/9= 0.888888888888889
100p? if you would like to explain what the variable p is i could help out