Two airport control towers are 20 miles apart. Tower A is straight west of Tower B. If there is an airplane flying between both towers and the angle of elevation from Tower A is 21° and the angle of evaluation from Tower B is 36°. If we assume the angles of elevation were taken from a height of .25 miles above the ground. Find the height of the airplane above the ground. (Assume the ground between the two towers is level).

Refer to interactive solution 17.45 to review a method by which this problem can be solved. the fundamental frequencies of two air columns are the same. column a is open at both ends, while column b is open at only one end. the length of column a is 0.504 m. what is the length of column b?

Joel wants to buy a new tablet computer fram a store having a 20% off sale on all tablets. the tablet he wants has an original cost of $190. he also wants to make sure he has enough money to pay the 5% sales tax. part one joel uses the incorect expression 0.95(190)(0.8) to calculate that the tablet will cost him a total of $144.40. describe his error and write the correct expression part two how much will joel pay for the tablet show your work if you answer this question correctly you will receive a prize of 99 points good luck

Identify the number as a rational or irrational. explain. 127