## anonymous one year ago A particular beach is eroding at a rate of 4 centimeters per year. A realtor converts this rate to millimeters per day. Which expression, when evaluated, results in the correct units and numerical value?

1. Michele_Laino

we have 4 cm= 40 mm, furthermore since 1 year contains 365 days, then 4 cm per year means: (40/365) mm per days

2. Michele_Laino

more precisely, since 4 cm = 40 mm then the eroding rate is: $\Large \frac{{40}}{1}\;{\text{mm/year}}$ furthermore, since 1 year contains 365 days, then I can rewrite such rate as below: $\Large \frac{{40}}{{365}}\;{\text{mm/day}}$