A boat is heading towards a lighthouse, whose beacon-light is 132 feet above the water. The boat’s crew measures the angle of elevation to the beacon, 5 degree . What is the ship’s horizontal distance from the lighthouse (and the shore)?

Solve 2x+y=3 x+y=5 in substitution method

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?

How many ordered pairs of positive integers satisfy xy=32?