Ahelicopter starting on the ground is rising directly into the air at a rate of 25 ft/s. you are running on the ground starting directly under the helicopter at a rate of 10 ft/s. find the rate of change of the distance between the helicopter and yourself (in ft/s) after 5 s.

The second term of an arithmetic sequence is 30. the fifth term is 90.calculatei). the commor difference of the sequence ii). the first term of the sequence tje first, second and fifth terms of the arithmetic sequence are the first three terms of a geometric sequence calculate the seventh term of the geometric sequence