which means that power is being used at the rate of 1000 watts per hour. For example, a 600-watt electric ... If she uses the iron 4^ hr. a week, how much, to the nearest cent, does the electricity cost per week ? 2. It costs Mrs. Modern 1.80 peranbsp;...

Title | : | Junior Arithmetic |

Author | : | David Eugene Smith, Eva May Luse, Edward Longworth Morss |

Publisher | : | - 1930 |

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