How much bigger is the 7 in 37856 than in 756

An advertising firm has an old computer that can prepare a whole mailing in 6 hours. with the of newer model the job is complete in 2 hours. how long would it take the newer model to do the job alone?

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate.true or false?