A scientist viewed a bacterial cell under a microscope. The image measured 6.25 mm and the actual cell was 25 µm. Calculate the magnification the scientist used. × 156.25
× 156 250
× 0.25
× 250

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.