The Walk for Kids (WfK) is an annual fundraising event that raises money for research on children’s blood disorders. WfK costs $120,000 to stage even if nobody shows up. To encourage people to...

The Walk for Kids (WfK) is an annual fundraising event that raises money for research on children’s blood disorders. WfK costs $120,000 to stage even if nobody shows up. To encourage people to participate, each walker is given a T-shirt that costs WfK $8 and refreshments that cost an average of $10 per person. This year, the organizers of the walk got a $20,000 grant from the City Foundation to offset part of the costs associated with staging the walk. WfK raises money by asking each walker to pay $10 to register and requires each walker to solicit sponsors who agree to pay $0.75 (75 cents) per mile for each of the 10 miles that the walker completes. In the past, all the walkers completed the 10-mile course and had an average of 20 sponsors.

1. How many walkers have to participate in the walk for the event to at least break even?

2. If the cost of refreshments per walker increases from $10 to $11, the break-even number of

walkers will

a. increase.

b. decrease.

c. stay the same.