Hailey received some cash for her birthday. she spend $14.48 on a cd and donated $25.00 to charity. she put half of what was left into her savings account. she has $17.76 left. how much did she receive on her birthday?

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)