Kami and her mother offer tours of a nearby canyon. They charge a $50 base rate plus $10 per person for a 2.5 hour tour. Which equation represents A, the amount they make to tour p people thorough the canyon?

The $50 base rate is a fixed amount, and the $10 charge for each of p people is 10p. Add these amounts to get the total: A = 50 + 10p. Choice B, 10p + 50 = A, represents this equation.

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