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

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)

Find each sum or difference. 4 - 9

In Exercises 35–38, 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}

In Exercises 33–38, find the union of the sets.{ a, e, i, o, u } ⋃ ∅

Multiply or divide as indicated. Write answers in lowest terms as needed. (6/11)/(5/4)

Find each sum or difference. -6 - 5

Determine whether each statement is true or false. 3 ∈ {2, 5, 6, 8}

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.8.4X10⁸ / 4x10⁵