Brittany has budgeted no more than $90 for guitar lessons. lessons cost $15 each. she has already spent $30 on lessons. write an inequality that can be used to find the total number of guitar lessons that brittany can still have.

The velocity of sound in air is given by the equation , where v is the velocity in meters per second and t is the temperature in degrees celsius. find the temperature when the velocity is 329 meters per second by graphing the equation. round the answer to the nearest degree. show your work.