Tuition costs at various colleges vary from $$15,000$ to $$30,000$ annually. These tuitions are expected to increase over time. If the annual rate of increase is $2$ percent, what will be the new range in tuition costs in ten years? Use Appendix A to answer the questions. Round your answers to the nearest dollar.

The range at $2$ percent is $

$-$ $

$.$

If the rate doubles from $2$ to $4$ percent, what will be the range in tuition costs after ten years? Use Appendix A to answer the questions. Round your answers to the nearest dollar.

The range at $4$ percent is $

$-$ $

$.$