An observer (o) is located 900 feet from a building (b). the observer notices a helicopter (h) flying at a 49° angle of elevation from his line of sight. how high is the helicopter flying over the building? you must show all work and calculations to receive full credit. a right triangle is shown with one leg measuring 900 and another leg measuring h with an angle across from it measuring 49 degrees.

Determine whether the following statements are true and give an explanation or counterexample. bold a. when using the shell method, the axis of the cylindrical shells is parallel to the axis of revolution. bold b. if a region is revolved about the y-axis, then the shell method must be used. bold c. if a region is revolved about the x-axis, then in principle it is possible to use the disk/washer method and integrate with respect to x or the shell method and integrate with respect to y.

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?