0. Review of Algebra

Find each sum or difference. 13 + (-4)

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.(3X10⁴)(2.1X10³)

Insert ∈ or ∉ in each blank to make the resulting statement true. 0 _____ {0, 2, 3, 4}

Insert ∈ or ∉ in each blank to make the resulting statement true. 0 _____ {0, 5, 6, 7, 8, 10}

Multiply or divide as indicated. Write answers in lowest terms as needed. (21/8)*(4/7)

Find each sum or difference. -7/3 + 3/4

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.(1.6X10¹⁵)(4X10⁻¹¹)

Write each number in decimal notation: 7.45*10^(-5)

In Exercises 29–34, find the union of the sets. {e,m,p,t,y} ∪ ∅

Write each number in scientific notation. 3,590,000

Find each sum or difference. -2.8 + 4.5

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. {-9, -4/5, 0, 0.25, √3, 9.2, √100}

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.(6.1X10⁻⁸)(2X10⁻⁴)

Insert ∈ or ∉ in each blank to make the resulting statement true. {0} _____ {0, 1, 2, 5}

Multiply or divide as indicated. Write answers in lowest terms as needed. 3(1/4)*1(2/3)