Party selena is planning a birthday party for her little sister at a local zoo. the price depends on the number of children that attend the party. the price per child is normally $7. however, if there are more than 10 children in a group, the group can pay a $20 fee plus $4 per child.

which piecewise-defined function best models the cost of the party c(x) if selena invites x children?



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