Suppose one balloon costs $2. Use the table to find the cost of different numbers of balloons that Lucy might buy.

Number of Balloons 1 2 3 4 5 10 15 21
Cost
($) 2

1.2 balloons

2.15 balloons


3.10 balloons

4.21 balloons

5.3 balloons

6.4 balloons

7.5 balloons
a.$30
b.$21
c.$20
d.$50
e.$18
f.$6
g.$23
h.$4
i.$42
j.$10
k.$8