Jane broke 2 slippers larry broke 19 glasses reduce the ratios in lowest terms

In the rectangle below ac=30 units what is de

Write 17/20 as a decimal and as a percent.

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)