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1. |
The rule for multiplying by powers of 10 states that if the exponent of the 10 is positive, then you move the decimal point __________. |
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A. |
to the right by the number of spaces as the number in the exponent minus 1 |
B. |
to the right by the same number of spaces as the number in the exponent |
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C. |
to the left by the same number of spaces as the number in the exponent |
D. |
to the right by the number of spaces as the number in the exponent plus 1 |
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Hint |
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2. |
Which is the correct definition for a number expressed in scientific notation? |
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A. |
A number is expressed in scientific notation when it is in the form a × 10n, where  and n is an integer. |
B. |
A number is expressed in scientific notation when it is in the form a × 10n, where and n is a whole number. |
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C. |
A number is expressed in scientific notation when it is in the form a × 10n, where  and n is a whole number. |
D. |
A number is expressed in scientific notation when it is in the form a × 10n, where and n is an integer. |
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Hint |
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3. |
Express 0.00000083 in scientific notation. |
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A. |
0.83 × 10-6 |
B. |
83 × 10-8 |
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C. |
-8.3 × 10-7 |
D. |
8.3 × 10-7 |
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Hint |
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4. |
Express 8 micrograms in scientific notation. |
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A. |
8 × 10-6 grams |
B. |
8 × 106 grams |
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C. |
8 × 10-9 grams |
D. |
8 × 109 grams |
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Hint |
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5. |
Evaluate the expression 0.000008 × 17,000,000,000. |
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A. |
13,600 |
B. |
136,000 |
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C. |
136 |
D. |
1,360,000 |
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Hint |
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