91Ó°ÊÓ

Convert each number into scientific notation. $$12,340$$

Simplify each of the following expressions as completely as possible. Final answers should be expressed with positive exponents only. (Assume that all variables represent positive quantities.) $$7 \cdot 7^{0}$$

Multiply and simplify each of the following. Whenever possible, do the multiplication of two binomials mentally. $$\left(-2 r^{2}\right)(5 r)\left(-r^{3}\right)$$

Simplify each of the following as completely as possible. $$m^{6} m^{4} m^{3}$$

Multiply out each of the following. As you work out the problems, identify those exercises that are either a perfect square or the difference of two squares. $$(x+6)(x+2)$$

Multiply and simplify each of the following. Whenever possible, do the multiplication of two binomials mentally. $$6 x\left(x^{3}-x^{2}+2 x\right)$$

Simplify each of the following expressions as completely as possible. Final answers should be expressed with positive exponents only. (Assume that all variables represent positive quantities.) $$x y^{0}$$

In Exercises \(1-18,\) answer the following questions: (a) How many terms are there? (b) What is the degree of each term? (c) What is the degree of the polynomial? $$2 x^{3}-5 x^{2}+x$$

Convert each number into scientific notation. $$0.0085370$$

Multiply and simplify each of the following. Whenever possible, do the multiplication of two binomials mentally. $$6 x\left(x^{3}\right)\left(-x^{2}\right)(2 x)$$