In 19—21, use words to describe the language defined by the given regular expression.
21.
Finite Mathematics
Mathematical Applications for the Management, Life, and Social Sciences
Mathematical Excursions (MindTap Course List)
Finite Mathematics for the Managerial, Life, and Social Sciences
Mathematics: A Practical Odyssey
Mathematics For Machine Technology
Elementary Technical Mathematics
Statistics for The Behavioral Sciences (MindTap Course List)
Calculus: An Applied Approach (MindTap Course List)
Study Guide for Stewart's Single Variable Calculus: Early Transcendentals, 8th
Multivariable Calculus
Finite Mathematics and Applied Calculus (MindTap Course List)
Calculus of a Single Variable
Multivariable Calculus
Elements Of Modern Algebra
Research Methods for the Behavioral Sciences (MindTap Course List)
Introduction To Statistics And Data Analysis
Calculus (MindTap Course List)
Trigonometry (MindTap Course List)
Applied Calculus
College Algebra (MindTap Course List)
Research Methods for the Behavioral Sciences (MindTap Course List)
Calculus: Early Transcendentals
Single Variable Calculus: Early Transcendentals
Calculus: Early Transcendental Functions
Applied Calculus for the Managerial, Life, and Social Sciences: A Brief Approach
Single Variable Calculus: Early Transcendentals, Volume I
Calculus: Early Transcendental Functions (MindTap Course List)
Elementary Geometry For College Students, 7e
Statistics for Business & Economics, Revised (MindTap Course List)
Calculus (MindTap Course List)
Essentials Of Statistics
Contemporary Mathematics for Business & Consumers
Probability and Statistics for Engineering and the Sciences
Study Guide for Stewart's Multivariable Calculus, 8th
Essentials of Statistics for The Behavioral Sciences (MindTap Course List)
Intermediate Algebra
Precalculus: Mathematics for Calculus (Standalone Book)
Elementary Geometry for College Students
STATISTICS F/BUSINESS+ECONOMICS-TEXT
Essentials Of Statistics For Business & Economics
Understanding Basic Statistics
Single Variable Calculus
Functions and Change: A Modeling Approach to College Algebra (MindTap Course List)
A First Course in Differential Equations with Modeling Applications (MindTap Course List)
Calculus Volume 2
Calculus Volume 1
College Algebra
Introductory Statistics
Modern Business Statistics with Microsoft Office Excel (with XLSTAT Education Edition Printed Access Card) (MindTap Course List)