Final answer:
Nina's family spent a total of $43.96 at the berry farm.
Step-by-step explanation:
To calculate the total amount Nina's family spent at the berry farm, we need to add up the costs of the small buckets of blueberries, the hayride, and the berry smoothies.
Each small bucket of blueberries cost $2.99 and there are 4 family members, so the total cost of the blueberries is 4 * $2.99 = $11.96.
The family paid $3.50 apiece for the hayride, so the total cost of the hayride is 4 * $3.50 = $14.
They ordered 4 berry smoothies at $4.50 each, so the total cost of the smoothies is 4 * $4.50 = $18.
In total, Nina's family spent $11.96 + $14 + $18 = $43.96 at the berry farm.