The cost of shipping a package from Las Vegas, NV to Effingham, IL is $10.75 for a package weighing up to but not including 1 pound and $3.95 for each additional pound or portion of a pound. A model...

The cost of shipping a package from Las Vegas, NV to Effingham, IL is $10.75 for a package weighing up to but not including 1 pound and $3.95 for each additional pound or portion of a pound. A model for the total cost C (in dollars) of sending the package is C=10.50+3.95[[x]], x>0 where x is the weight in pounds. Determine the range of weight the package if the cost is $50.