Question #13f34

1 Answer
Mar 22, 2015

#$72#

There are several ways to think about and answer this question.

One is to find the cost of coral in #$/(kg)# and then multiply by 8,000.
Or find the cost of coral in #$/(1000 kg)# and then multiply by 8.

Alternatively, we can think of this as a Proportion:

find the number #n# for which:

#n# is to #8000# as #27# is to #3000#

#n:8000 = 27:3000#

#n/8000 = 27/3000#

#3000*n = 8000*27#

#n=(8000*27)/3000 = (8*27)/3=8*9=72#