Radical expressions are used in real life in carpentry and masonry. Rational expressions are used to compute interest and depreciation in the financial industry.
Radical expressions are mathematical expressions that contain a square root. They are commonly found in trigonometry and geometry. Radical expressions are also found in electrical engineering.
Rational exponents are exponents that are in the form of a fraction. A rational exponent can be used to calculate the inflation on a home over a period of time. In science, biologists use rational exponents to compare the surface areas of different animals to each other to help with size comparisons.