2 + -9n = 56. -9n = 54. N = -6
The motion of the ball as described above is an example of geometric sequence. A geometric sequence is that which the value of the succeeding terms share a common ratio. From the given, since the ball is dropped in 10 ft from the ground, this is the a1 or or the first term.
2 +3 + 7 + 5 = 17 which in mixed numbers is 4 integers 1/4