# Percent/Scientific Notation: Question Preview (ID: 437)

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Simplify (3* 10 ^8)(7* 10^7) |
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a) 21*10^14 | b) 2.1*10^16 | c) 2.1*10^13 | d) 0.21*10^12 | |

The width of a plant cell has been measured as 1.276* 10^ -5 meters. How is this value written in standard form notation? |
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a) 0.00001276 meters | b) 0.0001276 meters | c) 0.001276 meters | d) 0.01276 meters | |

Find 1.53* 10^ -4 |
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a) .000153 | b) 153,000 | c) .00000153 | d) 15,300 | |

Simplify 3(2.416* 10^ 2) |
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a) 7.248* 10 ^2 | b) 7.248 * 10 ^5 | c) 7.248* 10 ^ 6 | d) 7.248* 30 ^ 2 | |

Rewrite the number 0.000000437 using scientific notation. |
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a) 4.37* 10 ^ -7 | b) 0.437 * 10 ^ -7 | c) 0.437 * 10 ^7 | d) 4.37 * 10 ^7 | |

Max's parents bought a new car that cost $18,575 before taxes. They paid $1,532.44 in sales tax. What is the sales tax rate? |
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a) 8.25% | b) 8% | c) 7.5% | d) 8.375% | |

There are 400 students in Zack's school. 21% of the students are enrolled in choir. Of these, 75 are enrolled in band. How many students are enrolled in both choir and band? |
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a) 63 students | b) 84 students | c) 300 students | d) 384 students | |

Last year the Foreign Language Club had 25 members. This year it has 30 members. What is the percent increase in membership? |
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a) 20% | b) 16 2/3% | c) 75% | d) 83 1/3% | |

Walter is a waiter at the Towne Diner. He earns a daily wage of $50 plus tips that are equal to 15% of the total cost of the dinner he serves. What was the total cost of the dinners he served on Tuesday if he earned $170? |
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a) $800 | b) $650 | c) $625 | d) $270 | |

Teen birthrates in the U.S. declined from 62.1 births per 1,000 teenagers in 1991 to 48.5 in 2000. What is the percent of decrease? |
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a) 22% | b) 14% | c) 28% | d) 34% | |

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