Can someone help mee please please!

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Which suspect most likely committed the robbery and how do you know

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false