9. a pile of sand erodes at a rate of 1 inch per week. after 2 weeks, the pile
of sand is 18 inches in height. a pile of soil erodes according to the table
below.
number of weeks
height
17.5 inches
16.5 inches
15 inches
13 inches
blo
which statement is true?
a the sand pile is initially higher and erodes at a faster rate.
b. the soil pile is initially higher and erodes at a faster rate.
c. the sand pile is initially higher but the soil pile erodes at a faster
rate.
d. the soil pile is initially higher but the sand pile erodes at a faster
rate.