Answer i will give good rating and mark brainlest what is the speed of a wave that has a wavelength of 40 cm and a frequency of 4 hz (cycles/second)? a) 160 cm/s b) 1 mm/s c) 10 cm/s d) 40 cm/s

Answer fast for brainliest! what type of image is formed by a refracting telescope? an enlarged, upside-down virtual image a reduced-size, right-side-up virtual image a reduced-size, right-side-up real image an enlarged, upside-down real image