A set of data has a mean of 32 and a standard deviation of 3.6. According to Chebyshev's Theorem, at least what percent of the data is between 24.8 and 39.2?

At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.