Ahelicopter is hovering over a landing pad 100 m from where you are standing. the helicopters angle of elevation with the ground is 15 degrees. what is the altitude of the helicopter?

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?

Which of the following is the sum of 3 1/6 + 6 3/8?

Find the solution on the interval [0, 2pi)