Unit 1 Review (Number Worlds, Level J)

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How do you express 0.000093 in scientific notation?

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9.3 × 10⁻⁵

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Which of these is not a rational number: 1/3, √3, 3, 0.3?

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√3

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Which answer shows a correct relationship: 8.4 x 10^4 > 5.1 x 10^6, 6.5 x 10^4 < 7.1 x 10^3, 3.7 x 10^5 < 5.6 x 10^2, 2.2 x 10^7 > 9.8 x 10^5?

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2.2 x 10^7 > 9.8 x 10^5

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-16

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Define a rational number.

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A rational number is any number that can be expressed as the quotient or fraction of two integers.

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What is scientific notation?

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A way of expressing numbers that are too big or too small to be conveniently written in decimal form.

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What is the rule for negative exponents?

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A negative exponent indicates the reciprocal of the base raised to the absolute value of the exponent.

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How do you convert a decimal to scientific notation?

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Move the decimal point to the right of the first non-zero digit and count the number of places moved; this becomes the exponent of 10.

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