Final answer:
The Fantastic Four made 56 chocolate chip cookies, which is 35% of the 160 cookies they made for the bake sale.
Step-by-step explanation:
The members of the Fantastic Four made a total of 160 cookies together (4 members × 40 cookies each). Knowing that 35% of their cookies are chocolate chip, we can calculate the number of chocolate chip cookies by taking 35% of 160 cookies. First, convert the percentage to a decimal: 35% equals 0.35. Then multiply the total number of cookies made by this decimal. Hence, the calculation is 160 cookies × 0.35 = 56 chocolate chip cookies.