In Exercises 31–50, perform the indicated computations. Write the answers in scientific notation. If necessary, round the decimal factor in your scientific notation answer to two decimal places.(4.3X10⁸)(6.2X10⁴)

Multiply or divide as indicated. Write answers in lowest terms as needed. $2\frac{2}{3}\cdot 1\frac{3}{5}$

Insert ∈ or ∉ in each blank to make the resulting statement true. {2} ____ {2, 4, 6, 8}

Perform the indicated operation and write the answer in decimal notation.$(3\times {10}^3)(1.3\times {10}^2)$

Insert ∈ or ∉ in each blank to make the resulting statement true. . 0 ____ ∅

Find each sum or difference. 4 - 9

List all numbers from the given set that are a. natural numbers, b. whole numbers, c. integers, d. rational numbers, e. irrational numbers, f. real numbers. {-11, -5/6, 0, 0.75, √5, π, √64}

Insert ∈ or ∉ in each blank to make the resulting statement true. ∅ ____ ∅