Find the top of a tower 100m high, two boat's are seen in a direction due south. the angle of depression of the boats from the top of the tower is 60 and 30 find the distance between the boats

Arestaurant offers delivery for their pizzas. the total cost the customer pays is the price of the pizzas, plus a delivery fee. one customer pays $23 to have 2 pizzas delivered. another customer pays $59 for 6 pizzas. how many pizzas are delivered to a customer who pays $86?