Final answer:
Elaine will save $105 by purchasing a year membership to the Science Center instead of paying for 7 individual visits with tickets and parking.
Step-by-step explanation:
The question asks how much money Elaine will save if she buys a membership to the Science Center instead of paying for individual tickets and parking on each visit. Given that Elaine plans to visit 7 times, the cost without the membership would be the sum of the ticket and parking costs for each visit. The cost of a single visit is $35 for the ticket and $5 for parking, making it $40 per visit. Multiplying this by 7 visits gives us $280. If Elaine buys a membership for $175, she would save the difference between the individual visit costs and the membership fee.
Here is the calculation: $280 (total cost without membership) - $175 (membership cost) = $105 saved.