Four members of the Kaplan family will take a river trip down the Colorado River in Colorado State Park. The rafting company charges $10 per person for a half-day river trip, or $100 flat rate for a half-day river trip. The raft can hold up to 10 people. How much will the trip cost the Kaplan family at the per person rate? How many people must be on the river trip to make the flat rate less expensive than the per person rate?

To find out how much the trip will cost the Kaplan family at the per person rate, we need to determine how many people are going on the trip and multiply that by the cost per person.

Given that there are four members in the Kaplan family, the cost for each member will be $10. Therefore, the total cost for the Kaplan family at the per person rate is:

Total Cost = Number of People * Cost per Person

Total Cost = 4 * $10

Total Cost = $40

So, the trip will cost the Kaplan family $40 at the per person rate.

To determine how many people must be on the river trip to make the flat rate less expensive than the per person rate, we need to compare the cost of having 10 people at the per person rate with the flat rate.

At the per person rate, the cost for 10 people would be:

Total Cost = Number of People * Cost per Person

Total Cost = 10 * $10

Total Cost = $100

This cost matches the flat rate of $100.

Thus, the flat rate becomes less expensive than the per person rate when there are 10 people or more in the group.

4*10 = 40

10 * 10 = 100
so eleven, but the raft only holds ten :)