we know that
Nata spent on DVDs
so
by proportion
Find the cost of DVDs
therefore
The answer Part a) is
The cost of DVDs is
Part b) Find the unit rate
we know that
Unit Rate is the ratio of two measurements in which the second term is
so
Find the cost of DVDs
therefore
the unit rate is
The answer Part b) is
Nata spent her money at the rate
b. How much fencing materials does she need ?
well do you need to find the area or perimeter