This is for math pls help and if u post a link or dont give me a real answer im reporting you

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)

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

‼️‼️‼️10 points‼️‼️‼️ me it’s important‼️‼️‼️‼️‼️