What is 8.478 in expanded form?

Given: ac and db are diameters. m∠3=

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)

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are: