Final answer:
The number of visits when the preferred plan and basic plan will cost the same is 79 visits.
Step-by-step explanation:
To find the number of visits when the preferred plan and basic plan will cost the same, we need to set up an equation.
Let's assume that after x number of visits, the cost of the preferred plan and the basic plan will be equal.
For the preferred plan, the total cost is given by the equation: $300 + $1.50x.
For the basic plan, the total cost is given by the equation: $25 + $5x.
Setting the two equations equal to each other, we get: $300 + $1.50x = $25 + $5x.
Simplifying the equation, we have: $275 = $3.50x.
Dividing both sides of the equation by $3.50, we get: x = 78.57. Rounded to the nearest whole number, the number of visits when the preferred plan and basic plan will cost the same is 79 visits.