Aseries of ocean waves are moving past a surfer at a frequency of 25 waves per hour. approximately how many waves should the surfer expect during 45 minutes?

45 minutes corresponds to  of hour. There are 25 waves per hour, so we must find how many waves there are in  of hour. Therefore we can write the following proportion:

and by solving ,we find

So, the surfer should expect almost 19 waves in 45 minutes.

Which of the following are risk factors for emphysema ? correct answer : a and and c          good luck and have a nice benevolentpuppy day! : )