The bill from your plumber was $134. the cost for labor was $32 per hour. the cost for materials was $46. how many hours did the plumber work?

Can someone check my answer? you : )

Mary used 1/7 of a spool of ribbon to complete 4 projects. she used the same amount of ribbon on each project. how much ribbon did she use on each project?

Here is my question! 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?