Chapter P - Section P.1 - Algebraic Expressions, Mathematical Models, and Real Numbers - Exercise Set - Page 20: 160

a. 4 b. 6 c. When dividing exponents with the same base, the powers should be subtracted from each other.

a. $b^{7}$$\div$$b^{3}$=$b^{7-3}$=$b^{4}$ b. $b^{8}$$\div$$b^{2}$=$b^{8-2}$=$b^{6}$ c. When dividing exponents with the same base, the powers should be subtracted from each other.