3.6 in= 55 miles
55x3= 165
55/6= 9
165+9= 174
174 miles
Sorry a bit messy, with a ratio of 2:5:1, that means 5 would be the longest and your longest piece is 125, diving 125 by 5 gets you 25 cm, this is also your shortest piece since 1x25=25
So you just plug in the X value of the number that d represents for example if I plug in 2 for d
7(2)^2+10=38
You take the total amount of birdseed (55 cups) and divide that by the amount of birdseed used each day (3/4 cup or 0.75 cup).
55/0.75= 73.33
so the birdseed will last 73.3 days