Answer:[tex]2.67\ \$\ \text{per month}[/tex]
Step-by-step explanation:
Given
Price of album grows to [tex]\$ 18[/tex] from [tex]\$ 10[/tex]
So, net increase in price[tex]=18-10=\$ 8[/tex]
for a period of 3 months
So, each month Price multiplies by
[tex]\Rightarrow \frac{8}{3}\ \$\text{per month}[/tex]
[tex]\Rightarrow 2.67\ \$\ \text{per month}[/tex]