PLEASE HELP ASAP

how does the ribosome read the mRNA?

Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?

Other than earth, is also known to have magnetic pole reversal? a: venus b: mars c: earths moon d: the sun

According the inverse square law, doubling the distance from the source of the sound, a speaker, for example, will drop the sound 6 db each time. if you were standing in the back of an auditorium, 32 feet away from a speaker not using any amplification, would you be able to hear a speaker clearly? why or why not?